From a $200 m$ high tower, one ball is thrown upwards with speed of $10 m / s$ and another is thrown vertically downwards at the same speed simultaneously. The time difference of their reaching the ground will be nearest to

12 s

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6 s

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2 s

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1 s

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Solution

The correct option is A $2 s$
The ball thrown upward will have zero velocity in $1 s$ . It returns back to thrown point in another $1 s$ with the same velocity as second. Thus the difference will be $2 s$ .

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From a 200m high tower, one ball is thrown upwards with speed of 10m/s and another is thrown vertically downwards at the same speed simultaneously. The time difference of their reaching the ground will be nearest to

The correct option is A 2sThe ball thrown upward will have zero velocity in1s. It returns back to thrown point in another 1s with the same velocity as second. Thus the difference will be 2s.

From a $200 m$ high tower, one ball is thrown upwards with speed of $10 m / s$ and another is thrown vertically downwards at the same speed simultaneously. The time difference of their reaching the ground will be nearest to

The correct option is A $2 s$
The ball thrown upward will have zero velocity in $1 s$ . It returns back to thrown point in another $1 s$ with the same velocity as second. Thus the difference will be $2 s$ .