Question

A body of mass 5 Kg is moving with a velocity of 10 m/s. A force is applied on it so that in 25 s , it attains a velocity of 35 m/s. calculate the value of the force applied.

Answer 1

m= 5kg
u= 10m/s
v= 35m/s
t= 25sec
we know,
f=m.a (a= v-u/t)
f= m(v-u/t)
f= 5(35-10/25)
f= 5N

Answer 2

Given,

mass,m=5kg

initial speed ,u=10m/s

final speed,v=35m/s

time taken, t=25sec

To calculate:- The value of force applied

Formula to be used:-

• acceleration =change in velocity/time
• force =mass×acceleration

Solution:-

• a=v-u/t

☆putting the all value

a=35-10/25

a=25/25

a=1 m/s²

• f=m×a

☆putting the value

f=m×a

f=5kg×1m/s²

f=5kg.m/s²or 5N

F=5N