Problem 5.1QQ: Which of the following statements is correct? (a) It is possible for an object to have motion in the... Problem 5.2QQ: An object experiences no acceleration. Which of the following cannot be true for the object? (a) A... Problem 5.3QQ: You push an object, initially at rest, across a frictionless floor with a constant force for a time... Problem 5.4QQ: Suppose you are talking by interplanetary telephone to a friend who lives on the Moon. He tells you... Problem 5.5QQ: (i) If a fly collides with the windshield of a fast-moving bus, which experiences an impact force... Problem 5.6QQ: You press your physics textbook flat against a vertical wall with your hand. What is the direction... Problem 5.7QQ: Charlie is playing with his daughter Toney in the snow. She sits on a sled and asks him to slide her... Problem 5.1OQ: The driver of a speeding empty truck slams on the brakes and skids to a stop through a distance d.... Problem 5.2OQ: In Figure OQ5.2, a locomotive has broken through the wall of a train station. During the collision,... Problem 5.3OQ: The third graders are on one side of a schoolyard, and the fourth graders are on the other. They are... Problem 5.4OQ: The driver of a speeding truck slams on the brakes and skids to a stop through a distance d. On... Problem 5.5OQ: An experiment is performed on a puck on a level air hockey table, where friction is negligible. A... Problem 5.6OQ: The manager of a department store is pushing horizontally with a force of magnitude 200 N on a box... Problem 5.7OQ: Two objects are connected by a siring that passes over a frictionless pulley as in Figure 5.14a.... Problem 5.8OQ: An object of mass m is sliding with speed v, at some instant across a level tabletop, with which its... Problem 5.9OQ: A truck loaded with sand accelerates along a highway. The driving force on the truck remains... Problem 5.10OQ: A large crate of mass m is place on the flatbed of a truck but not tied down. As the truck... Problem 5.11OQ: If an object is in equilibrium, which of the following statements is not true? (a) The speed of the... Problem 5.12OQ: A crate remains stationary after it has been placed on a ramp inclined at an angle with the... Problem 5.13OQ: An object of mass m moves with acceleration a down a rough incline. Which of the following forces... Problem 5.1CQ: If you hold a horizontal metal bar several centimeters above the ground and move it through grass,... Problem 5.2CQ: Your hands are wet, and the restroom towel dispenser is empty. What do you do to get drops of water... Problem 5.3CQ: In the motion picture It Happened One Night (Columbia Pictures, 1934), Clark Gable is standing... Problem 5.4CQ: If a car is traveling due westward with a constant speed of 20 m/s, what is the resultant force... Problem 5.5CQ: A passenger sitting in the rear of a bus claims that she was injured when the driver slammed on the... Problem 5.6CQ: A child tosses a ball straight up. She says that the ball is moving away from her hand because the... Problem 5.7CQ: A person holds a ball in her hand, (a) Identify all the external forces acting on the ball and the... Problem 5.8CQ: A spherical rubber balloon inflated with air is held stationary, with its opening, on the west side,... Problem 5.9CQ: A rubber ball is dropped onto the floor. What force causes the ball to bounce? Problem 5.10CQ: Twenty people participate in a tug-of-war. The two teams of ten people are so evenly matched that... Problem 5.11CQ: Can an object exert a force on itself? Argue for your answer. Problem 5.12CQ: When you push on a box with a 200-N force instead of a 50-N force, you can feel that you are making... Problem 5.13CQ: A weight lifter stands on a bathroom scale. He pumps a barbell up and down. What happens to the... Problem 5.14CQ: An athlete grips a light rope that passes over a low-friction pulley attached to tire ceiling of a... Problem 5.15CQ: Suppose you are driving a classic car. Why should you avoid slamming on your brakes when you want 10... Problem 5.16CQ: In Figure CQ5.16, the light, taut, unstretchable cord B joins block 1 and the larger-mass block 2.... Problem 5.17CQ: Describe two examples in which the force of friction exerted on an object is in the direction of... Problem 5.18CQ: The mayor of a city reprimands some city employees because they will not remove the obvious sags... Problem 5.19CQ: Give reasons for the answers to each of the following questions: (a) Clan a normal force be... Problem 5.20CQ: Balancing carefully, three boys inch out onto a horizontal tree branch above a pond, each planning... Problem 5.21CQ: Identity action-reaction pairs in the following situations: (a) a man takes a step (b) a snowball... Problem 5.22CQ: As shown in Figure CQ5.22, student A, a 55-kg girl, sits on one chair with metal runners, at rest on... Problem 5.23CQ Problem 5.1P: A certain orthodontist uses a wire brace to align a patients crooked tooth as in Figure P5.1. The... Problem 5.2P: If a man weighs 900 N on the Earth, what would he weigh on Jupiter, where the free-fall acceleration... Problem 5.3P: A 3.00-kg object undergoes an acceleration given by a=(2.00i+5.00j)m/s2. Find (a) the resultant... Problem 5.4P: A certain orthodontist uses a wire brace to align a patients crooked tooth as in Figure P5.4. The... Problem 5.5P: A toy rocket engine is securely fastened to a large puck that can glide with negligible friction... Problem 5.6P: The average speed of a nitrogen molecule in air is about 6.70 102 m/s, and its mass is 4.68 1026... Problem 5.7P: The distinction between mass and weight was discovered after Jean Richer transported pendulum clocks... Problem 5.8P: (a) A cat with a mass of 850 kg in moving to the right with a constant speed of 1.44 m/s. What is... Problem 5.9P: Review. The gravitational force exerted on a baseball is 2.21 N down. A pitcher throws the ball... Problem 5.10P: Review. The gravitational force exerted on a baseball is Fgj. A pitcher throws the ball with... Problem 5.11P: Review. An electron of mass 9. 11 1031 kg has an initial speed of 3.00 105 m/s. It travels in a... Problem 5.12P: Besides the gravitational force, a 2.80-kg object is .subjected to one other constant force. The... Problem 5.13P: One or more external forces, large enough to be easily measured, are exerted on each object enclosed... Problem 5.14P: A brick of mass M has been placed on a rubber cushion of mass m. Together they are sliding to the... Problem 5.15P: Two forces, F1=(6.00i4.00j)N and F2=(3.00i+7.00j)N, act on a particle of mass 2.00 kg that is... Problem 5.16P: The force exerted by the wind on the sails of a sailboat is 390 N north. The water exerts a force of... Problem 5.17P: An object of mass m is dropped al t = 0 from the roof of a building of height h. While the object is... Problem 5.18P: A force F applied to an object of mass m1, produces an acceleration of 3.00 m/s2. The same force... Problem 5.19P: Two forces F1 and F2 act on a 5.00-kg object. Taking F1 = 20.0 N and F2 = 15.0 N, find the... Problem 5.20P: You stand on the seat of a chair and then hop off. (a) During the time interval you are in flight... Problem 5.21P: A 15.0-lb block rests on the floor. (a) What force does the floor exert on the block? (b) A rope is... Problem 5.22P: Review. Three forces acting on an object are given by F1=(2.00i2.00j)N, and F1=(5.00i3.00j)N, and... Problem 5.23P: A 1 00-kg car is pulling a 300-kg trailer. Together, the car and trailer move forward with an... Problem 5.24P: If a single constant force acts on an object that moves on a straight line, the objects velocity is... Problem 5.25P: Review. Figure P5.15 shows a worker poling a boata very efficient mode of transportation across a... Problem 5.26P: An iron bolt of mass 65.0 g hangs from a string 35.7 cm long. The top end of the string is fixed.... Problem 5.27P: Figure P5.27 shows the horizontal forces acting on a sailboat moving north at constant velocity,... Problem 5.28P: The systems shown in Figure P5.28 are in equilibrium, If the spring scales are calibrated in... Problem 5.29P: Assume the three blocks portrayed in Figure P5.29 move on a friction less surface and a 42-N force... Problem 5.30P: A block slides down a frictionless plane having an inclination of 15.0. The block starts from rest... Problem 5.31P: The distance between two telephone poles is 50.0 m. When a 1.00-kg bird lands on the telephone wire... Problem 5.32P: A 3.00-kg object is moving in a plane, with its x and y coordinates given by x = 5t2 1 and y = 3t3... Problem 5.33P: A bag of cement weighing 325 N hangs in equilibrium from three wires as suggested in Figure P5.33.... Problem 5.34P: A bag of cement whose weight is Fg hangs in equilibrium from three wires as shown in Figure P5.18.... Problem 5.35P: Two people pull as hard as they can on horizontal ropes attached to a boat that has a mass of 200... Problem 5.36P: Figure P5.36 shows loads hanging from the ceiling of an elevator that is moving at constant... Problem 5.37P: An object of mass m = 1.00 kg is observed to have an acceleration awith a magnitude of 10.0 m/s2 in... Problem 5.38P: A setup similar to the one shown in Figure P5.38 is often used in hospitals to support and apply a... Problem 5.39P: A simple accelerometer is constructed inside a car by suspending an object of mass m from a string... Problem 5.40P: An object of mass m1 = 5.00 kg placed on a frictionless, horizontal table is connected to a string... Problem 5.41P: Figure P5.41 shows the speed of a persons body as he does a chin-up. Assume the motion is vertical... Problem 5.42P: Two objects are connected by a light string that passes over a friction less pulley as shown in... Problem 5.43P: Two blocks, each of mass m = 3.50 kg, are hung from the ceiling of an elevator as in Figure P5.43.... Problem 5.44P: Two blocks, each of mass m, are hung from the ceiling of an elevator as in Figure P5.43. The... Problem 5.45P: In the system shown in Figure P5.23, a horizontal force Facts on an object of mass m2 = 8.00 kg. The... Problem 5.46P: An object of mass m1 hangs from a string that passes over a very light fixed pulley P1 as shown in... Problem 5.47P: A block is given an initial velocity of 5.00 m/s up a frictionless incline of angle = 20.0 (Fig.... Problem 5.48P: A car is stuck in the mud. A tow truck pulls on the car with the arrangement shown in Figure P5.24.... Problem 5.49P: Two blocks of mass 3.50 kg and 8.00 kg arc connected by a massless string that passes over a... Problem 5.50P: In the Atwood machine discussed in Example 5.9 and shown in Figure 5.14a, m1 = 2.00 kg and m2 = 7.00... Problem 5.51P: In Example 5.8, we investigated the apparent weight of a fish in an elevator. Now consider a 72.0-kg... Problem 5.52P: Consider a large truck carrying a heavy load, such as steel beams. A significant hazard for the... Problem 5.53P: Review. A rifle bullet with a mass of 12.0 g traveling toward the right at 260 m/s strikes a large... Problem 5.54P: Review. A car is traveling at 50.0 mi/h on a horizontal highway. (a) If the coefficient of static... Problem 5.55P: A 25.0-kg block is initially at rest oil a horizontal surface. A horizontal force of 75.0 N is... Problem 5.56P: Why is the following situation impassible? Your 3.80-kg physics book is placed next to you on the... Problem 5.57P: To determine the coefficients of friction between rubber and various surfaces, a student uses a... Problem 5.58P: Before 1960m people believed that the maximum attainable coefficient of static friction for an... Problem 5.59P: To meet a U.S. Postal Service requirement, employees footwear must haw a coefficient of static... Problem 5.60P: A woman at an airport is towing her 20.0-kg suitcase at constant speed by pulling on a strap at an... Problem 5.61P: Review. A 3.00-kg block starts from rest at the top of a 30.0 incline and slides a distance of 2.00... Problem 5.62P: The person in Figure P5.30 weighs 170 lb. As seen from the front, each light crutch makes an angle... Problem 5.63P: A 9.00-kg hanging object is connected by a light, in extensible cord over a light, frictionless... Problem 5.64P: Three objects are connected on a table as shown in Figure P5.31. The coefficient of kinetic friction... Problem 5.65P: Two blocks connected by a rope of negligible mass are being dragged by a horizontal force (Fig.... Problem 5.66P: A block of mass 3.00 kg is pushed up against a wall by a force P that makes an angle of = 50.0 with... Problem 5.67P: Review. One side of the roof of a house slopes up at 37.0. A roofer kicks a round, flat rock that... Problem 5.68P: Review. A Chinook salmon can swim underwater at 3.58 m/s, and it can also jump vertically upward,... Problem 5.69P: Review. A magician pulls a tablecloth from under a 200-g mug located 30.0 cm from the edge of the... Problem 5.70P: A 5.00-kg block is placed on top of a 10.0-kg block (Fig. P5.36). A horizontal force of 45.0 N is... Problem 5.71P: The system shown in Figure P5.49 has an acceleration of magnitude 1.50 m/s2. Assume that the... Problem 5.72AP: A black aluminum glider floats on a film of air above a level aluminum air track. Aluminum feels... Problem 5.73AP: A young woman buys an inexpensive used car stock car racing. It can attain highway speed with an... Problem 5.74AP: Why is the following situation impossible? A book sits on an inclined plane on the surface of the... Problem 5.75AP: Review. A hockey puck struck by a hockey stick is given an initial speed i in the positive x... Problem 5.76AP: A 1.00-kg glider on a horizontal air track is pulled by a string at an angle . The taut string runs... Problem 5.77AP: A frictionless plane is 10.0 m long and inclined at 35.0. A sled starts at the bottom with an... Problem 5.78AP: A rope with mass mr is attached to a block with mass mb as in Figure P5.42. The block rests on a... Problem 5.79AP: Two blocks of masses m1 and m2, are placed on a table in contact with each other as discussed in... Problem 5.80AP: On a single, light, vertical cable that does not stretch, a crane is lifting a 1 207-kg Ferrari and,... Problem 5.81AP: An inventive child named Nick wants to reach an apple in a tree without climbing the tree. Sitting... Problem 5.82AP: In the situation described in Problem 41 and Figure P5.41, the masses of the rope, spring balance,... Problem 5.83AP: In Example 5.7, we pushed on two blocks on a table. Suppose three blocks are in contact with one... Problem 5.84AP Problem 5.85AP: An object of mass M is held in place by an applied force F and a pulley system as shown in Figure... Problem 5.86AP Problem 5.87AP: Objects with masses m, = 10.0 kg and nut = 5.00 kg are connected by a light string that passes over... Problem 5.88AP: Consider the three connected objects shown in Figure P5.88. Assume first that the inclined plane is... Problem 5.89AP: A crate of weight Fg is pushed by a force P on a horizontal floor as shown in Figure P5.45. The... Problem 5.90AP: A student is asked to measure the acceleration of a glider on a frictionless, inclined plane, using... Problem 5.91AP: A flat cushion of mass m is released from rest at the corner of the roof of a building, at height h.... Problem 5.92AP: In Figure P5.46, the pulleys and pulleys the cord are light, all surfaces are frictionless, and the... Problem 5.93AP: What horizontal force must be applied to a large block of mass M shown in Figure P5.49 so that the... Problem 5.94AP: An 8.40-kg object slides down a fixed, frictionless, inclined plane. Use a computer to determine and... Problem 5.95AP: A car accelerates down a hill (Fig. P5.95), going from rest to 30.0 m/s in 6.00 s. A toy inside the... Problem 5.96CP: A time-dependent force, F = (8.00i - 4.00/j), where F is in newtons and t is in seconds, is exerted... Problem 5.97CP: The board sandwiched between two other boards in Figure P5.97 weighs 95.5 N. If the coefficient of... Problem 5.98CP: Initially, the system of objects shown in Figure P5.49 is held motionless. The pulley and all... Problem 5.99CP: A block of mass 2.20 kg is accelerated across a rough surface by a light cord passing over a small... Problem 5.100CP: Why is the following situation impossible? A 1.30-kg toaster is not plugged in. The coefficient of... Problem 5.101CP: Review. A block of mass m = 2.00 kg is released from rest at h = 0.500 m above the surface of a... Problem 5.102CP: In Figure P5.55, the incline has mass M and is fastened to the stationary horizontal tabletop. The... Problem 5.103CP: A block of mass m = 2.00 kg rests on the left edge of a block of mass M = 8.00 kg. The coefficient... Problem 5.104CP: A mobile is formed by supporting four metal butterflies of equal mass m from a string of length L.... format_list_bulleted
