Question

How long does it take for the rock to hit the ground?

A boy throws a rock (mass = 2 kg) out a window. The window is 0.8m above the ground and the rock has an initial velocity: v= (10ˆi+ 3ˆj) m/s whereˆj is in the positive y direction.

How far does the rock travel horizontally in that time?

Answer 1

Please see below

Explanation:

In the given problem,the trajectory of the stone will be as follows,shown in the image below,because it was thrown in such a fashion,that it has `3 ms^-1` velocity in positive `Y` direction i.e upwards,so it will first go up and then come down to the same height and finally to the ground,but at the same time it was thrown with `10ms^-1` along positive `X` axis,i.e horizontally,so it will fall on the ground,far from the point of release,which stated as `CD` in the image.