A ball is thrown upward with a velocity of 100m/s it will reach the ground after :-

10 s

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20 s

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5 s

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40 s

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Solution

The correct option is B 20 s
Ball thrown vertically will suffer retardation of 'g'.
time taken by gravity to reduce balls speed to zero.
$0 = 100 + (- 10) t t = 10 sec .$
Ball will be at its peak at $t = 10 sec .$ .It will take same amount of time to comeback to ground total time $T = 20 s e c .$

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Similar questions

A ball thrown upward with a velocity of 100 m/s, then what will be the velocity when they reach the ground?

A ball is thrown vertically upwards from the top of a tower with an initial velocity of 19.6m/s. The ball reaches the ground after 5s. Calculate

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2. The velocity of ball on reaching the ground.

(Take g=9.8m/s)

100

100 m/s

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