Question

A force of 500N acts on a body of mass 10kg such that its velocity changes from vi to vf in 20s than the rate of change of momentum will be equal to A.500N B.50N C.250N D.200N

Answer 1

Answer:

i m not confirmed but i think answer is 250

Explanation:

F=500N  M=10KG   t=20sec    p=f*m/t    p=500*10/20   p=250    

Answer 2

Answer:

A. 500N

Explanation:

Using Impulse Momentum Theorem

F = m * a --------- (1)

where a = Δv / t

Δv = change of velocity

t = time

F = 500N

m = 10kg

t = 20s

using equation 1

500 = 10 * Δv / 20

       500 * 20

Δv = -------------   = 1000 m/s

            10

check:

impulse = change of momentum

therefore,  Ft = Δ(m*v)

      10 (1000)

F = --------------

          20

F = 500 N