Sarthaks Test
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A cricket bowler releases the ball in two different ways

(a) giving it only horizontal velocity, and

(b) giving it horizontal velocity and a small downward velocity. The speed vs at the time of release is the same. Both are released at a height H from the ground. Which one will have greater speed when the ball hits the ground? Neglect air resistance.

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For (a) (1/2)vz2 = gH         vz = √2gH

Speed at ground = vz2 + vz2 =  vz2 + 2gH

For (b) also [(1/2)mvs2 + mgH] is the total energy of the ball when it hits the ground.

So the speed would be the same for both (a) and (b).

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