A ball is gently dropped from a height of 30m. If its velocity increase uniform at the rate of 10m/s with what velocity will it strikes the ground ? After what time will it strike the ground?

Explanation:

We know that,

So, by using the third equation of motion, we will find out the final velocity of the ball.

Therefore,

∴ Hence, the required final velocity of the ball with which it strikes the ground is 24.5 m/s. Since, we know that the initial velocity of the ball is 0 m/s and the acceleration of the ball is 10 m/s². So, by using the first equation of motion, we will find out the time of the ball after which it stikes the ground.

Therefore,

∴ Hence, the required time of the ball after which it strikes the ground is 2.45 seconds.

prolly a beacuse the momentuem the car has increases while going down hill