Question

a body thrown vertically up from A point 125 m above the ground.it goes up to a maximum height of 250 m above the ground and passed through A on its downwards journey.the velocity of the body when it is at a height of 70m above the ground is (g=10 ms inverse)​

Answer 1

Answer:

60m/s

Explanation:

Consider the motion of body from maximum height of 250 m to the height 70 m.

Then, u=0,s=70−250=−180m,a=−10m/s

v

2

−u

2

=2as

⟹v

2

−0

2

=2×10×(250−70)

⟹v=60 m/s