At t = 0, truck, starting from rest, moves in the positive x-direction at uniform acceleration of 5 ms$-$2. At t = 20 s, a ball is released from the top of the truck. The ball strikes the ground in 1 s after the release. The velocity of the ball, when it strikes the ground, will be : (Given g = 10 ms$-$2)

Question

At t = 0, truck, starting from rest, moves in the positive x-direction at uniform acceleration of 5 ms^$-$2. At t = 20 s, a ball is released from the top of the truck. The ball strikes the ground in 1 s after the release. The velocity of the ball, when it strikes the ground, will be :

(Given g = 10 ms^$-$2)

$100\widehat i - 10\widehat j$

$10\widehat i - 100\widehat j$

$100\widehat i$

$ - 10\widehat j$

Solution

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