Question

(b) A motorcyclist riding motorcycle A who is travelling
at 36 km h-1 applies the brakes and stops the
motorcycle in 10 s. Another motorcyclist of
motorcycle B who is travelling at 18 km h-1 applies
the brakes and stops the motorcycle in 20 s. Plot
speed-time graph for the two motorcycles. Which
of the two motorcycles travelled farther before it
comes to a stop?
(SEPT 2011)​

Answer 1

Answer:

50m

Explanation:

Case I:

For motorist A,

Initial Velocity= u=36km/h=36x5/18=10 m/s

Time=t=10s

by using third equation of motion:

V²-u²=2as

0-10x10=2s(V-u)/t

0-10x10=2s(0-10)/10

-2s=-100s

=100/2=50m

Answer 2

Answer:

solution is attached for your reference along with approx graoh.