00 5 96 LL An airplane is flying in horizontal flight at a constant velocity. The weight of the airplane is 40,000 N. The wings produce a lift force that is perpendicular to the wings and a drag force that is parallel to the wings. The engine produces a forward thrust force of 2,000 N. Which of the following statements is true? Multiple Choice The drag force on the airplane is 38,000 N downward. The drag force on the airplane is 2,000 N backward. The lift force on the airplane is 42,000 N upward. < Prev 13 of 25 here to search 4:12 PM 直。 77°F p 岁 10/24/2021 P. dy 91 12 米 61 ins prt sc LL3 一 delete 144 home end dn 6d %24 4. 23 *: backspace 7. unu lock home enter 4. pause * shift W N end ctri ins USE YOUR SMARTPHONE FOR •Reviews •Videos Features MN 00 工 96 The drag force on the airplane is 38,000 N downward. The drag force on the airplane is 2,000 N backward. The lift force on the airplane is 42,000 N upward. The lift force on the airplane is zero. The drag force on the airplane is zero. < Prev 13 of 25 Next > e to search 4:12 PM C v JoLL 10/24/2021 hp 5 12 ins 米 LLJ delete 一 4 144 end %$4 backspace 3. 5. unu 7. lock home enter K. pause 1 shift end alt ctri USE YOUR SMARTPHONE FOR

00 5 96 LL An airplane is flying in horizontal flight at a constant velocity. The weight of the airplane is 40,000 N. The wings produce a lift force that is perpendicular to the wings and a drag force that is parallel to the wings. The engine produces a forward thrust force of 2,000 N. Which of the following statements is true? Multiple Choice The drag force on the airplane is 38,000 N downward. The drag force on the airplane is 2,000 N backward. The lift force on the airplane is 42,000 N upward. < Prev 13 of 25 here to search 4:12 PM 直。 77°F p 岁 10/24/2021 P. dy 91 12 米 61 ins prt sc LL3 一 delete 144 home end dn 6d %24 4. 23 : backspace 7. unu lock home enter 4. pause shift W N end ctri ins USE YOUR SMARTPHONE FOR •Reviews •Videos Features MN 00 工 96 The drag force on the airplane is 38,000 N downward. The drag force on the airplane is 2,000 N backward. The lift force on the airplane is 42,000 N upward. The lift force on the airplane is zero. The drag force on the airplane is zero. < Prev 13 of 25 Next > e to search 4:12 PM C v JoLL 10/24/2021 hp 5 12 ins 米 LLJ delete 一 4 144 end %$4 backspace 3. 5. unu 7. lock home enter K. pause 1 shift end alt ctri USE YOUR SMARTPHONE FOR

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter4: Newton's Laws Of Motion

Section: Chapter Questions

Problem 84AP: On an airplanes takeoff, the combined action of the air around the engines and wings of an airplane...

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A crate of weight Fg is pushed by a force P on a horizontal floor as shown in Figure P5.45. The coefficient of static friction is s, and P is directed at angle below the horizontal. (a) Show that the minimum value of P that will move the crate is given by P=sFgsec1stan Figure P5.45 (b) Find the condition on in terms of s, for which motion of the crate is impossible for any value of P.
A woman at an airport is towing her 20.0-kg suitcase at constant speed by pulling on a strap at an angle above the horizontal (Fig. 4.76). She pulls on the strap with a 35.0-N force, and the friction force on the suitcase is 20.0 N. (a) Draw a free-body diagram of the suitcase. (b) What angle does the strap make with the horizontal? (c) What is the magnitude of the normal force that the ground exerts on the suitcase? Figure P4.76
. Under certain conditions, the human body can safely withstand an acceleration of 10 g. (a) What net force would have to act on someone with mass of 50 kg to cause this acceleration? (b) Find the weight of such a person in pounds then convert the answer to (a) to pounds.
Two blocks, each of mass m, are hung from the ceiling of an elevator as in Figure P5.43. The elevator has an upward acceleration a. The strings have negligible mass. (a) Kind the tensions T1 and T2 in the upper and lower strings in terms of m, a. and g. (b) Compare the two tensions and determine which string would break first if a is made sufficiently large. (c) What are the tensions if the cable supporting the elevator breaks?
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 the horizontal as shown in Figure P5.34. The coefficient of static friction between the block and the wall is 0.250. (a) Determine the possible values for the magnitude of P that allow the block to remain stationary. (b) Describe what happens if P has a larger value and what happens if it is smaller. (c) Repeal parts (a) and (b), assuming the force makes an angle of = 13.0 with the horizontal. Figure P5.34
An aerial demonstration aircraft dives at an angle , accelerating from 95.0 m/s to 145 m/s in 7.00 s (Fig. P5.81). The pilot has hung a 0.150-kg keepsake at the end of a string from the hinge on the aircrafts canopy. During the dive, the string of the keepsake is seen to remain perpendicular to the top of the canopy. a. What is the angle of the aircrafts dive? b. What is the tension in the string? FIGURE P5.81
An elevator filled with passengers has a mass of 1.70103kg . (a) The elevator accelerates upward from rest at a rate of 1.20m/s2for 1.50 s. Calculate the tension in the cable supporting the elevator. (b) The elevator continues upward at constant velocity for 8.50 s. What is the tension in the cable during this time? (c) The elevator decelerates at a rate of 0.600 in/s2 for 0.600m/s2 3.00 s. What is the tension in the cable during deceleration? (d) How high has the elevator moved above its original starting point, and what is its final velocity?
An inventive child named Nick wants to reach an apple in a tree without climbing the tree. Sitting in a chair connected to a rope that passes over a frictionless pulley (Fig. P5.41), Nick pulls on the loose end of the rope with such a force that the spring scale reads 250 N. Nicks true weight is 320 N, and the chair weighs 160 N. Nicks feet are not touching the ground. (a) Draw one pair of diagrams showing the forces for Nick and the chair considered as separate systems and another diagram for Nick and the chair considered as one system. (b) Show that the acceleration of the system is upward and find its magnitude. (c) Find the force Nick exerts on the chair. Figure P5.41 Problems 41 and 44.
Does the ground need to exert a force on you for you to jump off the ground, or do you need to exert a force on the ground? If the ground must exert a force on you, is that force greater than the force you exert on the ground?
While sliding a couch across a floor, Andrea and Jennifer exert forces FA and FJ on the couch. Andrea’s force is due north with a magnitude of 130.0 N and Jennifer’s force is 32 east of north with a magnitude of 180.0 N. (a) Find the net force in component form. (b) Find the magnitude and direction of the net force. (c) If Andrea and Jennifer’s housemates, David and Stephanie, disagree with the move and want to prevent its relocation, with what combined forceFDS should they push so that the couch does not move?
A 6.0-kg object undergoes an acceleration of 2.0 m/s2. (a) What is the magnitude of the resultant force acting on it? (b) If this same force is applied to a 4.0-kg object, what acceleration is produced?
Two people pull as hard as they can on horizontal ropes attached to a boat that has a mass of 200 kg. If they pull in the same direction, the boat has an acceleration of 1.52 m/s2 to the right. If they pull in opposite directions, the boat has an acceleration of 0.518 m/s2 to the left. What is the magnitude of the force each person exerts on the boat? Disregard any other horizontal forces on the boat.