An 80.0-kg rock that was hurled by a catapult is about to hit a wall while traveling at 7.50 m/s. What is the kinetic energy of the rock just before contacting the wall?
Given: m = 80.0 kg; V = 7.50 m/s
What will be an ideal response?
KE = ½ mV2 = ½ (80.0 kg) (7.50 m/s)2 = 2250 J = 2.25 kJ
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