ly too carried away doing physics experiments, crashes his 1200 kg car into to a stationary 1500 kg car.  The resulting pileup pitches forward 1 m after the collision.  Assuming a coefficient of friction of 0.2, what was Mike’s initial velocity?  How much work wa

A mechanic pushes a m=2300 kg car from rest. He does W=4850 J of work in the process. During this time the car moves d327 m. Neglect the friction to answer the following questions. What is the horizontal force exerted on the car? Units: What is the velocity of the car at the final distance? Units:

Two people stand on opposite sides of each other (one on the left and one on the right) pulling on a rope in a game of tug of war. The two people pull on the rope with equal and opposite forces. Which of the following is the expected out come for the work done to the system? No work is done on the rope since the rope has no displacement. Each player does equal amount of non-zero work. The rope moves to the right and the work is positive. The rope moves to the left and the work is negative.

Several physical situations are described below. For each situation, simplify the work-energy equation by canceling any zero terms and any energy terms (whether KE or PE) which are unchanging. Explain each term which gets canceled. A track is constructed by stretching a grooved and pliable material between two lab poles. A metal ball starts from rest at point A and rolls to point B. Friction and air resistance have an effect upon the ball's motion. Simplification of Work-Energy Equation KEi + PEi + Wnc = KEf + PEf