Question

A ball is dropped from a height of 500 m. at what time will It touch the ground.?​

Answer 1

Approximately 10 seconds

Explanation:

The height of the drop = 500m

The ball is given no initial vertical velocity and is assumed to fall freely under gravity.

That also implies that we are ignoring air resistance, since no air resistance is mentioned.

Now. we have

$0.5gt^{2} = 500m$

$g = 9.8m/s^2$

But let us approximate it as

$g = 10m/s$

This gives $t^2 = 100$

Then we get time = 10 seconds

Therefore the ball will take 10 seconds to touch the ground.