**27. The model airplane in Figure 5.6 is flying at a speed of 22 m/s on ahorizontal circle of radius 16 m. The mass of the plane is 0.90 kg. Theperson holding the guideline pulls it in until the radius becomes 14 m.The plane speeds up, and the tension in the guideline becomes four timesgreater. What is the net work done on the plane?

Given:As per the condition,The mass of the plane m = 0.90 kgSpeed v = 22 m/s

Answered: **27. The model airplane in Figure 5.6…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter5: Energy

Section: Chapter Questions

Problem 43P: The system shown in Figure P5.43 is used to lift an object of mass m = 76.0 kg. A constant downward...

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The system shown in Figure P5.43 is used to lift an object of mass m = 76.0 kg. A constant downward force of magnitude F is applied to the loose end of the rope such that the hanging object moves upward at constant speed. Neglecting the masses of the rope and pulleys, find (a) the required value of F, (b) the tensions T1, T2, and T3, and (c) the work done by the applied force in raising the object a distance of 1.80 m. Figure P5.43
A small block of mass m = 200 g is released from rest at point along the horizontal diameter on the inside of a frictionless, hemispherical bowl of radius R = 30.0 cm (Fig. P7.45). Calculate (a) the gravitational potential energy of the block-Earth system when the block is at point relative to point . (b) the kinetic energy of the block at point , (c) its speed at point , and (d) its kinetic energy and the potential energy when the block is at point . Figure P7.45 Problems 45 and 46.
The system shown in Figure P5.43 is used to lift an object of mass m = 76.0 kg. A constant downward force of magnitude F is applied to the loose end of the rope such that the hanging object moves upward at constant speed. Neglecting the masses of the rope and pulleys, find (a) the required value of F, (b) the tensions T1, T2, and T3, and (c) the work done by the applied force in raising the object a distance of 1.80 m. Figure P5.43
A block of mass m = 2.50 kg is pushed a distance d = 2.20 m along a frictionless, horizontal table by a constant applied force of magnitude F = 16.0 N directed at ail angle = 25 below the horizontal as shown in Figure P7.5. Determine the work done on the block by (a) the applied force, (b) the normal force exerted by the table, (c) the gravitational force, and (d) the net force on the block.
A 300 g hockey puck is shot across an ice-covered pond. Before the hockey puck was hit, the puck was at rest. After the hit, the puck has a speed of 40 m/s. The puck comes to rest after going a distance of 30 m. (a) Describe how the energy of the puck changes over time, giving the numerical values of any work or energy involved. (b) Find the magnitude of the net friction force.
When a body slides down an inclined plane, does the work of friction depend on the body’s initial speed? Answer the same question for a body sliding down a curved surface.
A block of mass m = 2.50 kg is pushed a distance d = 2.20 m along a frictionless horizontal table by a constant applied force of magnitude F = 16.0 N directed at an angle = 25.0 below the horizontal as shown in Figure P5.8. Determine the work done by (a) the applied force, (b) the normal force exerted by the table, (c) the force of gravity, and (d) the net force on the block. Figure P5.8
A 537-kg trailer is hitched to a truck. Find the work done by the truck on the trailer in each of the following cases. Assume rolling friction is negligible. a. The trailer is pulled at constant speed along a level road for 2.30 km. b. The trailer is accelerated from rest to a speed of 88.8 km/h. c. The trailer is pulled at constant speed along a road inclined at 12.5 for 2.30 km.
. A compact car can climb a hill in 10 s. The top of the hill is 30 in higher than the bottom, and the car’s mass is 1,000 kg. What is the power output of the car?
The model airplane in Figure 5.6 is flying at a speed of 12.6 m/s on a horizontal circle of radius 17.2 m. The mass of the plane is 0.884 kg. The person holding the guideline pulls it in until the radius of the circle becomes 13.3 m. The plane speeds up, and the tension in the guideline becomes four times greater. What is the net work done on the plane?
Given that centripetal acceleration is: a c = v 2 r potential energy due to height is: P E h = m * g * h and kinetic energy is: K E = 1 2 m v 2 what is the correct equation for the maximum safe height of a loop (hloop) relative to the height of the hill (hhill) that came before it? Naturally, this is in the context of a roller coaster.
The model airplane in Figure 5.6 is flying at a speed of 14.0 m/s on a horizontal circle of radius 18.8 m. The mass of the plane is 1.14 kg. The person holding the guideline pulls it in until the radius of the circle becomes 10.5 m. The plane speeds up, and the tension in the guideline becomes four times greater. What is the net work done, in Joules, on the plane?

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