The (nonconservative) force propelling a 1.50 103-kg car up amountain road does 4.60 106 J of work on the car. The car startsfrom rest at sea level and has a speed of 24.0 m/s at an altitudeof 1.80 102 m above sea level. Obtain the work done on the car bythe combined forces of friction and air resistance, both of whichare nonconservative forces.

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A mechanic pushes a 3.40 103 kg car from rest to a speed of v,doing 5050 J of work in the process. During this time, the carmoves 20.0 m. Neglecting friction between car and road, find eachof the following.

(a) the speed v_________________________. m/s

(b) the horizontal force exerted on the car___________________.N

A mechanic pushes a 3.60 103 kg car from rest to a speed of v,doing 5100 J of work in the process. During this time, the carmoves 21.0 m. Neglecting friction between car and road, find eachof the following.
(a) the speed v
1. m/s

(b) the horizontal force exerted on the car
2. N

1. How far (in meters) must a 600 kg pile driver fall, ifit is to do 14000 J of work?

2. A spring whose spring constant is 150 N/m is compressed0.800 m. What speed (in meters/second) can it give to a 0.600 kgball when released?

3. A 550 N crate rests on the floor. How much work injoules is required to move it at constant speed 4.0 m along thefloor, against a friction force of 140 N?

4. What is the minimum work in joules needed to push a1710 kg car 74.0 m up a 12.5 degree incline? (Ignorefriction.)

6. A 1620 kg car rolling on a horizontal surface has aspeed of 70 km/hr when it strikes a horizontal coiled spring and isbrought to rest in a distance of 5.5 m. What is the spring constant(in N/m) of the spring? (Ignore nonconservative forces such asfriction.)

8. Tarzan is running at a top speed of 5.0 m/s and grabs avine hanging vertically from a tall tree in the jungle. How high(in meters) can he swing upward?

9. An object slides down a frictionless 33 degree inclinewhose vertical height is 87.0 cm. How fast is it going inmeters/second when it reaches the bottom?

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