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Q.

A ball of mass 500 gm is moving with velocity 2 m/s along a straight line. A constant force of 2 N acts on the ball for 2S in a direction opposite to the motion of the ball. Then final velocity of the ball is

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a

6 m/s in opposite direction

b

6 m/s in the initial direction

c

10 m/s in the initial direction

d

8 m/s in opposite direction

answer is A.

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Detailed Solution

m(v−u)=F×t0.5(V−2)=−2×2⇒V=−6m/s
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A ball of mass 500 gm is moving with velocity 2 m/s along a straight line. A constant force of 2 N acts on the ball for 2S in a direction opposite to the motion of the ball. Then final velocity of the ball is