1.

A motor car of mass 1200 kg is moving along a straight line with a uniform velocity of 90 kmph. Its velocity is slowed down to 18 kmph in 4 seconds by an external force. The acceleration of the body is:

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A motor car of mass 1200 kg is moving along a straight line with a uniform velocity of 90 kmph. Its velocity is slowed down to 18 kmph in 4 seconds by an external force. The acceleration of the body is:




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