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JEE Main Physics question

PhysicsWork, Energy and PowerJEE Main

A spring gun of spring constant 90 N/cm is compressed 12 cm by a ball of mass 16 g. If the trigger is pulled, the velocity of the ball is

Answer: (D)

Solution

K = 90 N/cm = 9000 N/m. Loss in spring PE converts entirely to KE of the ball:

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Question ID VK-153954