59..A 25 kg box is being pushed forward with a 85 N force. If the coefficient of friction of the box to the floor is 0.22, what is the acceleration of the box?

2. What is the work done to a 40.0 kg wagon that is being pushed with a force of 45N at an angle of 20 downward from the horizontal and moves 52 m down the road?

3. A 815 kg roller coaster starts at the top of a 47m hill and drops down the coaster. What is the speed of the roller coaster when it falls to a height of 12 m?

4. What is the time it takes for a 75.5 kg student to climb a rope that is 12 m high that has a power output of 105 W?

5. A softball with a mass of 185 g is toss at a speed of 25.6 m/s is hit and returns with a speed of 28.1 m/s in 0.55 s, what is the force from the bat?

6. A 210 kg bumper car is traveling 2.5m/s to the right hits a 175 kg bumper car traveling 3.75 m/s in the opposite direction. What is the velocity of the bumper cars when they collide and stick together? What type of collision is this?

7. A 45.0 kg carousel horse goes around at a speed of 4.8 m/s and a diameter of 9.5 m. What is the centripetal acceleration and centripetal force of the horse?

66..A kid is playing on a sit and spin and has a angular speed of 12 rev/min. After 25 revolutions, the kid has a speed of 1.5 rev/min. What is the angular acceleration (in rad/s) of the sit and spin?

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