Find the kinetic energy of the puck at the moment it hits the spring . Assume that

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Question:

Find the kinetic energy of the puck at the moment it hits the spring . Assume that the puck begins to move at frame 82. (It's hard to notice any movement between frames 82 and 85—but trust us, the puck is moving!)

the mass of the puck is 0.180 kg.

Here's a link to the video: https://mediaplayer.pearsoncmg.com/assets/_frames.true/secs-ice-puck-rebound

Here's a text description of the video: Video text description for DirectmEasurement Video of Dry-Ice Levitated Puck on a Ramp

In this video, a puck made out of dry ice is at the top of a ramp. At the bottom of the ramp is a spring, aligned parallel with the ramp. A scale marked off in centimeters overlays the video, also aligned parallel with the ramp, and a protractor indicates that the angle of the ramp is approximately 22 degrees. The video is recorded at 240 frames per second, resulting in playback motion 8 times slower than normal. A frame counter indicates the current frame. An action figure of Einstein looks on at the action.

At the start of the video, the puck is held in place by a strap. The left edge of the puck is at 0 centimeters and the right edge is at 7.7 centimeters. The height of the puck is approximately 2.6 centimeters.

At frame 82, the strap is released and the puck starts accelerating down the ramp. At frame 172, the left edge of the puck is at 25.3 centimeters. At this frame, the puck hits the spring, which then compresses as the puck continues to move down the ramp. At frame 184, the spring appears to be at its maximum compression and the puck is momentarily at rest. The left edge of the puck at this frame is at 29.7 centimeters.

As the video continues to play, the puck reverses direction as the spring uncompresses and bounces the puck back up the ramp, spinning a little while it slides. It does not slide all the way back to the top of the ramp, but instead at frame 274 the left edge of the puck gets only to about 4 centimeters on the scale. The puck then reverses direction one more time and slides back down the ramp, spinning as it slides, until the video stops.