Question

A car of mass 1200 kg is brought to rest by a uniform force of 300N in 80seconds. Find the speed at which a car was moving?

Answer 1

apply FORMULA:

F=mv/t

v=Ft/m

Answer 2

Explanation:

m=1200kg

f=300 kg m/s²

a=f/m

a=300/1200

a=0.25 m/s²

u=?

v=0 m/s

a= 0.25 m/s²

t= 80s

v=u-at

0=u-0.25*80

0=u-20

u=20 m/s

Here's your answer! The equation was in negative because it was retardation...