Question

A metal sphere of mass 200 g falls from a height of 5 m. Calculate the velocity
with which it will strike the ground. (g = 10 ms-2​

Answer 1

Answer:

14.14m/s

Explanation:

we know the formula

v = √(2gh)

v = √(2*10*10)m/s

v = √2 * 10

  = 14.14m/s

Answer 2

Metal sphere strike the ground at speed of $v=10m/s$

Explanation:

Given,

Mass of sphere=200 g

Height of sphere from the ground is   h

                                                   $h=5m$

Initial speed of sphere is u

u=0

Gravitational acceleration  is g

                                        $g=10m/s^{2}$

let final velocity be  v m/s

Calculate v,

Equation of  motion   $v^{2}=u^{2}+2gh$

$v^{2}=0+2\times 10\times 5$

$v^{2}=100m^{2}/s^{2}$

$v=\sqrt{100}m/s$

$v=10m/s$

Sphere strike the ground at the speed of    10 m/s