A 710 kg car drives at a constant speed of 23 m/s. It is subject to a drag force of 500 N. What power is required from the car’s engine to drive the cara. On level ground?b. Up a hill with a slope of 2.0°?

A farmer is using a rope and pulley to lift a bucket of water from the bottom of a well that is hy = 9.5 m deep. The farmer uses a force F1 = 59.5 N to pull the bucket of water directly upwards. The total mass of the bucket of water is mb + mw = 3.1 kg. a.Calculate how much work Wf in J the farmer does on the bucket of water (via the rope) to raise it to ground level.  b.Calculate how much work Wg in J gravity does on the bucket filled with water as the farmer lifts it up the well.  c. Calculate the net work Wnet in J done on the bucket of water by the two forces F1 and Fg.

A car has an engine that produces constant power. The car is accelerated from rest at t = 0, and at t = t0 the acceleration is a0. What is the acceleration of the car at = 4t0?

39 A 1.00 kg block slides down a 20.0 meter ramp at a constant velocity. The angle of inclination of the ramp is 30°. How much work is done by friction? Ans. 98.0 J 45. A car pulls a trailer with a force of 2000 N at 20.0 m/s. What is the Ans. 4.00 x 104 Watts power exerted?

5000 kg dump truck has a maximum 400 hp (1 hp= 746 W), and it is moving up on an inclined road witha slope of 15 degrees. If the frictional coefficient on the road is 0.80, what is the max constant speed that thetrucker can maintain on the inclined?

A student is pulling her wagon along a flat level ground with a 50.0N force 30 degrees above the horizontal. This applied force is against a horizontal frictional force of 30.0 N. If the student travels 8.00 meters east, what is the net work is done on the wagon? 1. 160 J 2. 346 J 3. 586 J 4. 106 J

A freight elevator weighs 6200 N. What is the power required to raise the elevator a. What a distance of 20 meters in 10 seconds? b. One of the motors for the freight elevator system goes out. Now the maximum power available to move the 6200 N freight elevator is 10 kW. How long does it take to raise the elevator 20 meters now?

A .770kg ball is attached to a 1.50m string and swung in a vertical circle. What is the total work done on the ball by gravity and tension?

An elevator is designed so that when it travels upward, it has constant acceleration from rest to its cruising speed of 2.0 m/s in a time of 4.0 seconds. The elevator has a mass of 625kg. Assume friction is ignored.  A. Determine the average power (in W) of the elevator motor while its accelerating upward to its cruising speed. B. Determine the motor power (in W) when the elevator is moving upward at its cruising speed.

A student pushes a 0.40 kg box up a 30° inclined plane at a constant speed of 1.2 m/s. The student performs 5.0 J of work and the block moves a distance s along the incline before he stops pushing the box. The frictional force acting on the box is 0.9ON. Determine the value of s. Ending position Starting 30° position O 1.16 m O 1.65 m O 1.75 m O 1.85 m O 1.04 m