Question

(b) An object of mass 50 kg is accelerated uniformly from a velocity of 4 m/s to 8 m/s in 8 s. Calculate the initial and final momentum of the object. Also find the magnitude of the force exerted on the object.​

Answer 1

Answer:

1/2 mv2 is P

Pf= 1/2.50.8.8 is 160 kg(m/s)2

pi is 1/2 .50.16 400 kgm/s2

F ∆p/∆t (400-160)/8s= 30N

Answer 2

Answer:

answer here

Explanation:

initial momentum-50×4(p×v)

final momentum-50×8

acceleration=vf-vi/t

8-4/8 =1/2m/s^2

force = ma =50×1/2=25N