Question

A stone is dropped from the edge of a roof. The roof is 19.6m high from the ground. (Take g= 9.8 m/s2 ) (a) How long does it take to reach the ground? (b) Calculate the velocity with which an object would hit the ground.​

Answer 1

Answer:

hi mate

Explanation:

By using the formula:

v2=u2+2as

v2=02+2×10×20

v2=400

v2=400

v=20m/s

For calculating time:

V=u+at

20=0+10×t

t=1020

t=2 sec

The the stone will hit the ground with a velocity of 20 m/s in sec.

Answer 2

Answer:

By using the formula:

v2=u2+2as

v2=02+2×10×20

v2=400

v2=400

v=20m/s

For calculating time:

V=u+at

20=0+10×t

t=1020

t=2 sec

The the stone will hit the ground with a velocity of 20 m/s in sec.

Explanation: