Question

A stone is dropped from the top of a 40 m high tower. Calculate its speed after 2 s. Also find the speed with which the stone strikes the ground.​

Answer 1

Answer:

ans is 28 m/s

Step-by-step explanation:

refer to attachments...................

Answer 2

Answer:

Given that,

Height = 40 m

Time t =2 sec

We know that,

v=u+gt

v=0+9.8×2

v=19.6m/s

The speed of stone is 19.6 m/s

Now, the speed with which the stone strikes the ground

v ^2=u 2 +2gs

v ^2 =0+2×9.8×40

v ^2 =784

v=28m/s

Hence, the speed with which the stone strikes the ground is 28 m/s