First slide

Second law

Question

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

NA

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

Solution

$\begin{array}{l} m (v - u) = F \times t \\ 0 .5 (V - 2) = - 2 \times 2 \Rightarrow V = - 6 m / s \end{array}$

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