A scooter is moving with a velocity of 90km\h takes 5 sec to stop after brakes are applied .Calculate the magnitude of force applied by brakes if the mass of the rider along with scooter is 200kg.
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-3800m/s^2……………...............
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Answer:
90km/h= 25m/sec
So, initial velocity (u)= 25m/sec
Time (t)=5 sec
Final velocity (v)= 0 [ Since, the scooter is made to stop by applying brakes]
Total Mass of scooter (m)= 200 kg
We know, Force = Mass x Acceleration [ 2nd Law]
= 200 ( 0-25/5) [ acc.= v-u / t ]
= 200 x (-5)
= -1000
Answer :- -1000 N.
Negative sign implies force applied in opposite direction to motion.
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