Question

If on applying the brakes, a car of mass 800 kg traveling at 90 km/h experiences a retarding force of 450 N, what will be its velocity after travelling through a distance of 200 m?

Answer 1

given

v=?

u=90km/h =25m/s (u need to calculate it)

s=200m

f= -450N

m=800kg

f=m×a

-450=800×a

a=-450/800=-9/16

By third equation of motion

v²=u²+2as

v=√(u²+2as)

=√(25²-2×9/16×200)

=√(625-225)

=√(400)

=20

So v=20

CHEERS!

Answer 2

Answer:

I'm from ryan my name is raunak arora who all is here like