Answers

2015-10-26T18:01:02+05:30
mass of the object= 120 kg
initial velocity of the object= 108 km/hr (30 m/s)
final velocity of the object= 0m/s
given time= 10 sec
therefore force,
force= change in momentum/time taken
F= (mv-mu)/t
F= (120*0-120*30)/10
F= (0-3600)/10
F= -3600/10
F= -360 N
 therefore the answer in magnitude is 360N
         i hope that this will help u......................^_^
1 5 1
2015-10-26T18:07:16+05:30
Initial velocity= 108 km/hr = 30 m/s
Final velocity = 0 m/s
Time = 10 s

Force = Mass x Acceleration
             = mass x v-u/t
             =120*0-30/10
              =120*-30/10
              =120*-3
              = -360 N


Therefore, to stop the scooter, you need to apply a force of 360N in opposite direction.

Hope it helps...!
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