Question

An object of mass 5kg is moving with a velocity of 10ms. A force is applied so that in 20s , it attains a velocity of 25ms.what is the force applied on the object?

Answer 1

acceleration = (V-U)/t
= (25-10)/20
= 15/20 = 3/4 ms-¹
Force = mass × acceleration
=5kg × (3/4)ms-¹
=15/4 N

Answer 2

Heya friend,

Here is the answer-


m= 5kg
u=10m/s
v=25m/s
t=20s
F= ?

F=ma= m(v-u)/t
=5(25-10/20)
=5(15/20)
=15/4 =3.75 N

Force applied = 15/4 N or 3.75N

Note-

u=initial velocity
v=final velocity
t=time
F=Force
m=mass

Hope it helps.....!!!!!!!