Question

a particle of mass 5kg start moving with an initial velocity 10m/s under the action a force varies with time as. 1) find final speed of the body when t= 15s. 2) find change in momentum when t= 5s​

Answer 1

Answer:

final speed=60m/s

∆p=250

Explanation:

m=5kg

u=10m/s

t=5

f=mv

f=5*10

f=50

∆p=f*t

∆p=50*5

=250

f=ma

50=5*a

a=10 m/s^2

v=u+at

v=10+10*5

v=60 m/s