Question

With what velocity must a body be projected vertically upwards to reach a height of 20m?
What is the final velocity and time taken when it reaches on height of 15m?

Answer 1

Answer:

80m

Explanation:

u=10ms

−1

;h=20m

u

1

=20ms

−1

;h

1

=?

h

1

h

=

u

1

2

u

2

;

h

1

20

=

20

2

10

2

h

1

=

100

20×400

=80m