Question

A ball is thrown vertically upwards with a speed of 49m/s.Calculate 1.Maximum height of the ball 2.Total time taken by the ball to reach the earth's surface​

Answer 1

Answer:

122.5 m

10 second

Explanation:

At the highest point, velocity = 0.

Initial velocity = u

Final velocity = 0

Here, acceleration = - g(going upward) and g(coming downward)

Using the equations of motion:

• v = u + at

= > 0 = 49 + (-g)t

= > 49/9.8 = t

= > 5 = t

Total time taken to go and return = 2 * time taken to go

= > total time = 2*5 = 10 sec

• v² = u² + 2aS

= > 0² = 49² + 2(-g)S

= > 49²/2(9.8) = S

= > 122.5 m = S