Physics

Problem

t = 0

, truck, starting from rest, moves in the positive

x

-direction at uniform acceleration of

5 \text{ ms}^{-2}

. At

t = 20 \text{ s}

, a ball is released from the top of the truck. The ball strikes the ground in

1 \text{ s}

after the release. The velocity of the ball, when it strikes the ground, will be (Given,

g = 10 \text{ ms}^{-2}

) (2022 Main, 30 June I) (a)

100\hat{i} - 10\hat{j}

(c)

100\hat{i}

(b)

10\hat{i} - 100\hat{j}

(d)

-10\hat{j}