Question

Mukesh throws stone vertically upwards with a a velocety of 42 m/s which reaches a height of 90m. what will be the tolal time by the stone to reach the Surface of the Earth?
plz tell aregent​

Answer 1

Answer:

Initial Velocity u=40

Final velocity v=0

Height, s=?

By third equation of motion

v

2

−u

2

=2gs

0−40

2

=−2×10×s

s=

20

160

⇒s=80m/s

Toatal distance travelled by stone = upward distance + downwards distance =2×s=160m

Total Displacement =0, Since the initial and final point is same.