Question

A stone is thrown horizontally at a speed of 8.0m/s from the edge of a Cliff 80m in height.how far from the bus of the Cliff will the stone strike The ground?​

Answer 1

Answer:

32.3 meters ?

Explanation:

1. t=√2h/g

2. x=Xo.t

Answer 2

Answer:

The stone will strike the ground at 32m from the base of the cliff.

Explanation:

The horizontal distance from the base of the cliff where the stone will strike the ground is,

$x=ut$     (1)

Where,

x=horizontal distance

u=speed with which the stone is thrown

t=total time taken by the stone to reach the ground

From the question we have,

u=8m/s

Height of the cliff(h)=80m

The time taken to reach the ground is calculated as,

$t=\sqrt{\frac{2h}{g} }$        (2)

g=acceleration due to gravity=10m/s²

By substituting the values on h and g in equation (2) we get;

$t=\sqrt{\frac{2\times 80}{10} }=\sqrt{16} =4sec$      (3)

By substituting the required values in equation (1) we get;

$x=8\times 4=32m$

Hence, the stone will strike the ground at 32m from the base of the cliff.