In the situation below, the 8.0 kg box has been launched with a speed of 10.0 m/s across a frictionless surface. Find the energy stored in the spring. In the initial situation, the spring was compressed 2.0 m. Find the spring constant.

Select all of the following that are equal to an impulse of 20 unitsa) force= 5, time= 5.5b) force= 25, time= 0.8c) force= 0.1, time= 200d) force= 10, time= 2(its b, c, and d)(also in order to find answer they have to add to get the unit)ex= 25x.8=20 or .1x200=20

What is the measure of a change in an objects velocity?

Describe the work performed by a ski lift in terms of kinetic and gravitational potential energy