Question

A sedan car of mass 200kg is moving with a certain velocity . It is brought to rest by the application of brakes, within a distance of 20m when the average resistance being offered to it is 500N.What was the velocity of the motor car?
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Answer 1

Answer:

10m/s

Explanation:

Mass=200kg

Distance=20m

Resistance force=ma

500=200*a

a=2.5

V^2=u^2+2as

V=0

0=u^2+2*-2.5*20

u^2==100

U=+-10

Right answer=10m/s