Question

A scooter of mass 150 kg is moving with a
uniform velocity of 108 km/hr. The force
required to stop the vehicle in 10 seconds is
(A) None of these (0) 360 N
(D) 420 N
(C) 450 N​

Answer 1

Answer:

The force required to stop the scooter is 450 N in opposite direction...

Explanation:

m=150kg

u=108km/hr=30m/s

v=0m/s

t=10s

v=u+at

0=30+10a

-30=10a

a=-3m/s2

F=ma

F=150×(-3)

F=-450N

Answer 2

Answer:

u=108km/hr, m=150kg,t =10sec,v=0

first we have to find acceleration,

v=u+at

0=u+at

u=-at

108km/hr=-a*10sec

108*1000/3600m/sec= -a*10sec

30m/sec= -a*10sec

-a=30/10m/sec

a= -(3)m/sec

a= -3m/sec

F=m*a

= 150*(-3)

= -450N

hence the force is required to stop the vechile in 10 seconds = 450N

here it is right answer

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