Envision yourself doing a jumping jack. Imagine you assume a standing X position, with your arms above your shoulders in a wide V and legs apart in an inverted V. When you hold that position, you are demonstrating ______ energy. When you do the jumping jack from the previous position you are converting that energy into _____ energy.

The roller coaster has a PE of 10,000 J when it begins its downhill run. How much total energy does it have when it is halfway down the hill?   Which answer below is correct 10,000 J 5,000 J 10,000 N 5,000 N

In the figure below, a block of ice slides down a frictionless ramp at angle 0 = 50° while an ice worker pulls on the block (via a rope) with a force Fr that has a magnitude of 45 N and is directed up the ramp. As the block slides through distance d = 0.31 m along the ramp, its kinetic energy increases by 60 J. How much greater would its kinetic energy have been if the rope had not been attached to the block? ---Select--- F. A

Your humble physics Professor elevates a ball hanging from a string away from it's lowest position and holds it there. It requires 105 J of Energy to do this. What is the balls change in PE ? 100 J O 105 J O Not enough information to answer this question O 50 J

A 12.5-kg crate slides along a horizontal frictionless surface at a constant speed of 4.0 m/s. The crate then slides down a frictionless incline and across a second horizontal surface as shown in the figure. 4.0 m/s Reference: Ref 6-5 3.0 m 4.0m What is the kinetic energy of the crate as it slides on the lower surface? ○290J 320 J 370 J 0470 J O570 J

Suppose a 385 g kookaburra (a large kingfisher bird) picks up a 70 g snake and raises it 2.4 m from the ground to a branch. (a) How much work (in J) did the bird do on the snake? (b) How much work (in J) did it do to raise its own center of mass to the branch? Additional Materials O Reading