Question

an object of mass 5 kg is accelerated uniformly from a velocity of 4 metre per second to 8 metre per second in 8 second calculate the initial and final momentum of the object also find magnitude of force experiment on object​

Answer 1

Given :-

Mass of body = m = 5 Kg

Initial Velocity of body = u = 4 ms-¹

Final Velocity of body = v = 8 ms-¹

Time = t = 8 s

Product of Mass and Velocity is known as Momentum. It is denoted by P.

∆P = m∆v

∆P = m(v-u)

∆P = 5(8-4)

∆P = 20 Kg ms-¹

As we know that Rate per change in Momentum is known as Force.

F = ∆P/t

F = 20/8

F = 5/2 N

F = 2.5 N

Hence,

Change in Momentum of body = ∆P = 20 Kg ms-¹

Force = F = 2.5 N