9. Work & Energy
Net Work & Work-Energy Theorem
5:18 minutes
Problem 7.86b
Textbook Question
Textbook QuestionA 25-g projectile is fired into a cube of ballistic gel at a velocity of 360 m/s. If the projectile penetrates 15 cm into the gel before stopping, find the average force exerted by the gel onto the projectile. Use
(b) the work-energy principle.
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