A car of mass 
starts from rest and acquires a velocity along east, 
in two seconds. Assuming the car moves with uniform acceleration, the force exerted on the car is:
A
eastward and is exerted by the car engine
B
eastward and is due to the friction on the tyres exerted by the road
C
More than 
castward exerted due to the engine and overcomes the friction of the road
castward exerted due to the engine and overcomes the friction of the road
D
exerted by the engine
Text Solution
Verified by ExpertsThe correct answer is:
B
Given, mass of the car 
As car starts from rest, 
Velocity acquired along east 
Duration, 
.
We know that
Force, 
Hence, force acting on the car is 
towards east. As external force on the system is only friction. Hence, the force on 
is by friction. Force by engine is internal force.
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