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JEE Main Physics question

PhysicsMechanical Properties of SolidsJEE Main

A catapult has a rubber cord of length 10 cm and cross-sectional area 20 . It is stretched by 4 cm to project a pebble of 10 g. Find the velocity (in m/s) of the pebble just after its launch. ( and )

Answer: 56.4

Solution

Elastic energy stored . Strain . Volume . Energy

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Question ID VK-155227