University Physics Volume 1 18th Edition
ISBN: 9781938168277
Author: William Moebs, Samuel J. Ling, Jeff Sanny
Publisher: William Moebs, Samuel J. Ling, Jeff Sanny
1 Units And Measurement 2 Vectors 3 Motion Along A Straight Line 4 Motion In Two And Three Dimensions 5 Newton's Law Of Motion 6 Applications Of Newton's Laws 7 Work And Kinetic Energy 8 Potential Energy And Conservation Of Energy 9 Linear Momentum And Collisions 10 Fixed-axis Rotation 11 Angular Momentum 12 Static Equilibrium And Elasticity 13 Gravitation 14 Fluid Mechanics 15 Oscillations 16 Waves 17 Sound Chapter5: Newton's Law Of Motion
Chapter Questions Section: Chapter Questions
Problem 5.1CYU: Check Your Understanding Find the magnitude and direction of the net force in the ice skater example... Problem 5.2CYU: Check Your Understanding A skydiver opens his parachute, and shortly thereafter, he is moving at... Problem 5.3CYU: Check Your Understanding At the time of its launch, the HMS Titanic was the most massive mobile... Problem 5.4CYU: Check Your Understanding A 550-kg sports car collides with a 2200-kg truck, and during the... Problem 5.5CYU: Check Your Understanding A car gas forces acting on it, as shown below. The mass of the car is... Problem 5.6CYU: Check Your Understanding For Example 5.8, find the acceleration when farmer’s applied force is 230.0... Problem 5.7CYU: Check Your Understanding Two blocks are at rest and in contact on a frictionless surface as shown... Problem 5.8CYU: Check Your Understanding A force of 1150 N acts parallel to a ramp to push a 250-kg gun safe into a... Problem 5.9CYU: Check Your Understanding One end of a 3.0-m rope is tied to a tree; the other, end is tied to a car... Problem 5.10CYU: Check Your Understanding (a) Draw the free-body diagram for the situation shown. (b) Redraw it... Problem 1CQ: What properties do forces have that allow us to classify them as vectors? Problem 2CQ: Taking a frame attached to Earth as inertial, which of the following objects cannot have inertial... Problem 3CQ: A woman was transporting an open box of cupcakes to a school party. The car in front of her stopped... Problem 4CQ: Why can we neglect forces such as those holding a body together when we apply Newton’s second law? Problem 5CQ: A rock is thrown straight up. At the top of the trajectory, the velocity is momentarily zero. Does... Problem 6CQ: What is the relationship between weight and mass? Which is an intrinsic, unchanging property of a... Problem 7CQ: How much does a 70-kg astronaut weight in space, far from any celestial body? What is her mass at... Problem 8CQ: Which of the following statements is accurate? (a) Mass and weight are the same thing expressed In... Problem 9CQ: When you stand on Earth, your feet push against it with a force equal to your weight. Why doesn’t... Problem 10CQ: How would you give the value of g in vector form? Problem 11CQ: Newton’s Third Law Identity the action and reaction forces in the following situations: (a) Earth... Problem 12CQ: Suppose that you are holding a cup of coffee in your hand. Identify all forces on the cup and the... Problem 13CQ: (a) Why does an ordinary rifle recoil (kick backward) when fired? (b) The barrel of a recoilless... Problem 14CQ: Common Forces A table is placed on a rug. Then a book is placed on the table. What does the floor... Problem 15CQ: A particle is moving to the right. (a) Can the force on it be acting to the left? If yes, what would... Problem 16CQ: Drawing Free-Body Diagrams In completing the solution for a problem involving forces, what do we do... Problem 17CQ: If a book is located on a table, how many forces should be shown in a free-body diagram of the book?... Problem 18CQ: If the book in the previous question is in free fall, how many forces should be shown in a free-body... Problem 19P: Two ropes are attached to a tree, and forces of and are applied. The forces are coplanar (In the... Problem 20P: A telephone pole has three cables pulling as shown from above, with and (a) Find the net force on... Problem 21P: Two teenagers are pulling on ropes attached to a tree. The angle between the ropes is 30 . David... Problem 22P: Two forces of and act on an object. Find the third force that is needed to balance the first two... Problem 23P: While sliding a couch across a floor, Andrea and Jennifer exert forces FA and FJ on the couch.... Problem 24P: Newton’s Second Law Andrea, a 63.0-kg sprinter, starts a race with an acceleration of 4.200m/s2 .... Problem 25P: If the sprinter from the previous problem accelerates at that rate for 20.00 m and then maintains... Problem 26P: A cleaner pushes a 4.50-kg laundry cart in such a way that the net external force on it is 60.0 N.... Problem 27P: Astronauts in orbit are apparently weightless. This means that a clever method of measuring the mass... Problem 28P: In Figure 5.12, the net external force on the 24-kg mower is given as 51 N. If the force of friction... Problem 29P: The rocket sled shown below decelerates at a rate of 196m/s2 . What force is necessary to produce... Problem 30P: If the rocket sled shown in the previous problem starts with only one rocket burning, what is the... Problem 31P: What is the deceleration of the rocket sled if it comes to rest in 1.10 s from a speed of 1000.0... Problem 32P: Suppose two children push horizontally, but in exactly opposite directions, on a third child in a... Problem 33P: A powerful motorcycle can produce an acceleration of 3.50m/s2 while traveling at 90.0 km/h. At that... Problem 34P: A car with a mass of 1000.0 kg accelerates from 0 to 90.0 km/h in 10.0 s. (a) What is its... Problem 35P: The driver in the previous problem applies the brakes when the car is moving at 90.0 km/h, and the... Problem 36P: An 80.0-kg passenger in an SUV traveling at 1.00103km/h is wearing a seat belt. The driver slams on... Problem 37P: A particle of mass 2.0 kg is acted on by a single force (a) What is the particle’s acceleration? (b)... Problem 38P: Suppose that the particle of the previous problem also experiences forces and What is its... Problem 39P: Find the acceleration of the body of mass 5.0 kg shown below. Problem 40P: In the following figure, the horizontal surface on which this block slides is frictionless. If the... Problem 41P: Mass and Weight The weight of an astronaut plus his space suit on the Moon is only 250 N. (a) How... Problem 42P: Suppose the mass of a fully loaded module in which astronauts take off from the Moon is 1.00104kg .... Problem 43P: A rocket sled accelerates at a rate of 49.0m/s2 . Its passenger has a mass of 75.0 kg. (a) Calculate... Problem 44P: Repeat the previous problem for a situation in which the rocket sled decelerates at a rate of... Problem 45P: A body of mass 2.00 kg is pushed straight upward by a 25.0 N vertical force. What is its... Problem 46P: A car weighing 12,500 N stalls from rest and accelerates to 83.0 km/h in 5.00 s. The friction force... Problem 47P: A body with a mass of 10.0 kg is assumed to be in Earth’s gravitationaI field with g=9.80m/s2 . What... Problem 48P: A fireman has mass m ; he hears the fire alarm and slides down the pole with acceleration a (which... Problem 49P: A baseball catcher is performing a stunt for a television commercial. He will catch a baseball (mass... Problem 50P: When the Moon is directly overhead at sunset, the force by Earth on the Moon FEM , is essentially at... Problem 51P: (a) What net external force is exerted on a 1100.0-kg artillery shell fired from a battleship if the... Problem 52P: A brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a... Problem 53P: A history book is lying on top of a physics book on a desk, as shown below a free-body diagram is... Problem 54P: A truck collides with a car, and during the collision, the net force on each vehicle is essentially... Problem 55P: Common Forces A leg is suspended in a traction system, as shown below (a) Which pulley in the figure... Problem 56P: Suppose the shinbone in the preceding image was a femur in a traction setup for a broken bone, with... Problem 57P: Two teams of nine members each engage in tug-of-war. Each of the first team’s members has an average... Problem 58P: What force does a trampoline have to apply to Jennifer, a 45.0-kg gymnast, to accelerate her... Problem 59P: (a) Calculate the tension in a vertical strand of spider web if a spider of mass 2.00105kg hangs... Problem 60P: Suppose Kevin, a 60.0-kg gymnast, climbs a rope. (a) What Is the tension in the rope if he climbs at... Problem 61P: Show that, as explained in the text, a force F exerted on a flexible medium at its center and... Problem 62P: Consider Figure 5.28. The driver attempts to get the car out of the mud by exerting a perpendicular... Problem 63P: A bird has a mass of 26g and perches in the middle of a stretched telephone line. (a) Show that the... Problem 64P: -m rope is tied to a tree; the other end is tied to a car stuck in the mud. The motorist pulls... Problem 65P: Consider the baby being weighed in the following figure. (a) What is the mass of the infant and... Problem 66P: What force must be applied to a 100.0-kg crate on a frictionless plane inclined at 30 to cause an... Problem 67P: A 2.0-kg block is on a perfectly smooth ramp that makes an angle of 30 with the horizontal. (a) What... Problem 68P: Drawing Free-Body Diagrams A ball of mass m hangs at rest, suspended by a sting. (a) Sketch all... Problem 69P: A car moves along a horizontal road. Draw a free- body diagram; be sure to include the friction of... Problem 70P: A runner pushes against the track, as shown. (a) Provide a free-body diagram showing all the forces... Problem 71P: The traffic light hangs from the cables as shown. Draw a free-body diagram on a coordinate plane for... Problem 72AP: Two small forces, F1=2.40i6.10tj N and F2=8.50i9.70j N , are exerted on a rogue asteroid by a pair... Problem 73AP: Two forces of 25 and 45 N act on an object. Their directions differ by 70 . The resulting... Problem 74AP: A force of 1600 N acts parallel to a ramp to push a 300-kg piano into a moving van. The ramp is... Problem 75AP: Draw a free-body diagram of a diver who has entered the water, moved downward, and is acted on by an... Problem 76AP: For a swimmer who has just jumped off a diving board, assume air resistance is negligible. The... Problem 77AP: (a) Find an equation to determine the magnitude of the net force required to stop a car of mass m,... Problem 78AP: A sailboat has a mass of 1.50103kg and is acted on by a force of 2.00103N toward the east, while the... Problem 79AP: Find the acceleration of the body of mass 10.0 kg shown below. Problem 80AP: A body of mass 2.0 kg is moving along the x -axis with a speed of 3.0 m/s at the instant represented... Problem 81AP: Force FBhas twice the magnitude of force FA. Find the direction in which the particle accelerates in... Problem 82AP: Shown below is a body of mass 1.0 kg under the influence of the forces FA,FB ,and mg . If the body... Problem 83AP: A force acts on a car of mass m so that the speed v of the car increases with position x as v=kx2... Problem 84AP: A 7.0-N force parallel to an incline is applied to a 1.0-kg crate. The ramp is tilted at 20 and is... Problem 85AP: Two boxes, A and B, are at rest Box A is on level ground, while box B rests on an inclined plane... Problem 86AP: A mass of 250.0 g is suspended from a spring hanging vertically. The spring stretches 6.00 cm. How... Problem 87AP: As shown below, two identical springs, each with the spring constant 20 N/m, support a 15.0-N... Problem 88AP: Shown below is a 30.0-kg block resting on a frictionless ramp inclined at 60 to the horizontal. The... Problem 89AP: In building a house, carpenters use nails from a large box. The box is suspended from a spring twice... Problem 90AP: A force is applied to a block to move it up a 30 incline. The incline is frictionless. If F=65.0Nand... Problem 91AP: Two forces are applied to a 5.0-kg object, and it accelerates at a rate of 2.0m/s2 in the positive y... Problem 92AP: The block on the tight shown below has more mass than the block on the left (m2m1). Draw free-body... Problem 93CP: If two tugboats pull on a disabled vessel, as shown here in an overhead view, the disabled vessel... Problem 94CP: A 10.0-kg object is initially moving east at 15.0 m/ s. Then a force acts on it for 2.00 s, after... Problem 95CP: On June 25, 1983, shot-putter Udo Beyer of East Germany threw the 7.26-kg shot 22.22 m, which at... Problem 96CP: A body of mass m moves in a horizontal direction such that at time t its position is given by... Problem 97CP: A body of mass m has initial velocity v0 in the positive x -direction. It is acted on by a constant... Problem 98CP: The velocities of a 3.0-kg object at and are and respectively. If the object is moving at constant... Problem 99CP: A 120-kg astronaut is riding in a rocket sled that is sliding along an inclined plane. The sled has... Problem 100CP: Two forces are acting on a 5.0-kg object that moves with acceleration 2.0m/s2 in the positive y... Problem 101CP: Suppose that you are viewing a soccer game from a helicopter above the playing field. Two soccer... Problem 102CP: A 10.0-kg mass hangs from a spring that has the spring constant 535 N/m. Find the position of the... Problem 103CP: A 0.0502-kg pair of fuzzy dice is attached to the rearview mirror of a car by a short string. The... Problem 104CP: At a circus, a donkey pulls on a sled carrying a small clown with a force given by . A horse pulls... Problem 105CP: Hanging from the ceiling over a baby bed, well out of baby’s reach, is a string with plastic shapes,... Problem 106CP: A bullet shot from a rifle has mass of 10.0 g and travels to the right at 350 m/s. It strikes a... Problem 107CP: An object is acted on by three simultaneous forces: F1=(3.00i+2.00j)N , F2=(6.00i4.00j)N , and... Problem 108CP: In a particle accelerator, a proton has mass 1.6710-27kg and an initial speed of 2.00105m/s . It... Problem 109CP: A drone is being directed across a frictionless ice- covered lake. The mass of the drone is 1.50 kg,... Problem 35P: The driver in the previous problem applies the brakes when the car is moving at 90.0 km/h, and the...
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A snack vendor is pushing his 125 kg cart with a force of 150N. a force of friction of 107.6N. acts on the cart. Assume cart starts at rest.
a) find net force on cart.
Definition Definition Force that opposes motion when the surface of one item rubs against the surface of another. The unit of force of friction is same as the unit of force.
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