A car of mass m starts from rest and acquires a velocity along east, v

1.	A car of mass m starts from rest and acquires a velocity along east, v - vhat(i) (v gt 0) in two seconds. Assuming the car moves with uniform acceleration, the force exerted on the car is
Answer» `(mv)/(2)` eastward and is EXERTED by the car engine. `(mv)/(2)` eastward and is due to the friction on the tyres exerted by the road. more than `(mv)/(2)` eastward exerted due to the engine and overcomes the friction of the road. `(mv)/(2)` exerted by the engine Solution :`(mv)/(2 )`eastwardand isdue to thefrictionon the typesexertedby theroad massof the car =m velocityalongeast`vec( V)= v hat(j )` `vhat(j ) = 0 + a (2)` ForceF = ma Force act on car in `(mv)/(2)` in east directionforceactingon systemis frictionalfroce `= (mv)/(2)` force by engingwill be interalforce

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