Question

if a ball is thrown vertically upwards, and it reaches its maximum height at 5m. find its initial speed and how much time is taken by the ball to reach the highest points ( g - 10m/s²)​

Answer 1

Answer:

Initial velocity, u = ?

Final velocity, v = 0

Acceleration due to gravity, g = 10 m/s

2

Height, h = 5 m

Using relation, for a freely falling body:

v

2

=u

2

+2gh

(0)

2

=(u)

2

+2×(−10)×5

0 = u

2

- 100

u

2

=100

So, u = 10 m/s

(b) Using relation v = u + gt

0 = 10 + (-10) t

-10 = -10t

t = 1 sec

Answer 2

Answer:

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t=1sec