Question

A ball of mass 0.2 kg moves with a velocity of 20 m/s and it stops in 0.1 s. The force acting on the ball is

Answer 1

mass of the ball= 0.2kg

ivitial velocity, V = 20m/s

final velocity, v= 0

time ,t = 0.1 sec

first of all let us find the acceleration of the ball, a = v- V / t

a= o-20/0.1

i hope u can solve this.

now yuo must not solve the first part, you must solve the second part of the question.

ii ) force=mass x acceleration

F= 0.2 x a

this 'a' value we have found out earlier.

i) impulse = force x time

i hope this helped you. if the answer is not clear, please do reply me.

Answer 2

u=20 m/s
v=0m/s
a=v-u
______
t
a=0-20
_______
0.1

a= -200 m/
${s}^{2}$

F =ma
F=0.2×-200
F=-199.8 N

F=-199.8 N

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