2. A 2000 kg car collides with a stationary telephone pole. The force of the impact is 87000N, and the time of the impact is 0.063 seconds. Solve for the impulse.​

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

If forces acting on an object are unbalanced. true or false

The force needed to overcome static friction is usually less than that needed to overcome kinetic friction.true or false?