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

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    

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

v 154.9= 0.9 length length s little over 154.9cm

resonant frequency