Question

The velocity of a body of mass 125 g changes from 10 m/s to 5 m/s in 5 second . assuming that a constant force acts on it, find the magnitude of the force

Answer 1

Force = mass × Acceleration

Acceleration = change in velocity ÷ time

Acceleration = (5 - 10) / 5 = - 5 / 5= - 1m/s²

The negative means it decelerates

Convert Mass to kgs :

125 / 1000 = 0.125Kg

Force = 0.125 × 1 = 0.125N

Answer :

0.125N

Answer 2

m=125g=125÷1000kg =1/8kg
u=10m/s
v=5m/s
t=5sec
a=?
f=?
then, by formula,
a=v-u÷t
a=-1m/s
then,
f=m.a
f=1/8 × -1
f=-1/8N...


.....HOPE ITS HELP YOU.....