Question

A ball is thrown horizontally from the top of a 41 m vertical cliff and lands 112 m from the base of the cliff. How fast is the ball thrown horizontally from the top of the cliff?

Answer 1

4.78 second

Step-by-step explanation:

given data

vertical cliff = 41 m

height = 112 m

solution

we know here time taken to fall vertically from the cliff = time taken to move horizontally ..........................1

so we use here vertical component of ball

and that is accelerated motion with initial velocity = 0

so we can solve for it as

height = 0.5 × g × t² ........................2

put here value

112 = 0.5 × 9.8 × t²

solve it we get

t² = 22.857

t = 4.78 second

ball thrown horizontally from the top of the cliff in 4.78 second