Question

A ball is thrown upward with the speed 'u'then the speed of the ball when it is at half the highest height attended by the ball?​

Answer 1

Answer:

Let consider H= Maximum height

g=−10m/s

2

v=0m/s final velocity at the maximum height

u= initial velocity,

3rd equation of motion,

v

2

−u

2

=2gh

0

2

−u

2

=−2gH

u

2

=2gH. . . . . .(1)

Now, h=

2

H

and v=10m/s

3rd equation of motion,

v

2

−u

2

=2gh

10

2

−2gH=−

2

2gH

100=

2

2gH

H=

2g

100×2

H=

2×10

100×2

=10m

The correct option is 10m