Question

A body of mass 5 kg is moving with a velocity of 10 m/s then what force is required to stop it in 20 second ??

Answer 1

v=u+at
0=10+a20
a=-10/20
a=-0.5m/s
which is retardation required
and force = mass ×acceleration
F=5*0.5=2.5N
pls mark brainleist

Answer 2

u= 10m/s
v= 0
t= 20sec

v = u +at
0= 10 + 20*a
>> a= - 0.5ms-2

F=ma
= 5*0.5= 2.5N