Question

distance covered by a ball thrown upwards with speed U and last 30 seconds before it reaches maximum height is dash​

Answer 1

Answer:

Let time of flight be T then T=

g

u

Let h be the distance covered during last 't' second of its ascent

Velocity at point B=V

B

=u−g(T−t)

=u−g(

g

u

−t)=gt

⇒h=V

B

t−

2

1

gt

2

⇒h=gt

2

−

2

1

gt

2

=

2

1

gt

2

Answer 2

Answer:

Refer to attachment::