Question

A car is moving with a velocity 20 m per second the brakes are applied to it had it at the rate of 2 metre per second square what will be the velocity after 5 seconds of applying the break

Answer 1

u =20m/s
a =2 m/s2
t =5 s
v=u+at
v=20+-5(2)
v=20-10
v=10m/s

Answer 2

U=20m/s

V=?

A=2m/s

T=5s

V=u-at

=20-2×5

=20-10

=10m/s