A car of mass 1 metric ton starts from rest and accelerates to a speed of 72 km/h
in 20 seconds. It then moves with a constant velocity for 80 seconds, and is
brought to rest in next 10 sec.
1x4
17(i) What is the force acting on the car from 0 to 20 second?
a) 1000 N
b) 200 N
c) 500 N
d) 100 N
17(ii) What is the force acting on the car from 20 second to 100 second?
a) 2000 N
b) 200 N
c) 100 N
d) Zero
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