This is a homework not in any book and I\'m trying to getstarted. A car moves fo

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This is a homework not in any book and I'm trying to getstarted.
A car moves forward because the ground pushes it forward. Thisforward push from the ground on the car results from the wheels ofthe car pushing backward on the ground (this is Newton's 3rd Law).Other forces, such as friction and drag, push backward on the car.You can assume that all the backward forces are constant asfunction of time (i.e. they do not change as the velocity of thecar changes). Let's consider a 1200 kg car that is capable ofaccelerating at a constant rate from a speed of 0 m/s to a speed of36 m/s in 4 s. The car is moving along a horizontal surface.
a) if the forward push on the car is 12,000 N, what is thebackward push on the car?
b) what is the net work done by all the forces acting on itwhile it is accelerating?
c) what is the average power supplied to the car by theforward push of 12,000 N during the 4 s that the car isaccelerating? (1 hp = 746 W)
d) what is the net work done by the force of gravity on thecar while it is accelerating?

Ok, on the first one I tried to find the net force by using akinematic equation and then eliminating that from the given forwardpush to get 1,200 N as backward push. Not sure if it's right.
The second one, I tried to do a motion diagram and add thevarious forces and got 86,400 J but it feels little of a numbersomehow.
The third one, well I'm pretty lost by this point.
I know I need all the previous answers in order to get fromone question to another.
Thanks a bunch for all and any help. :) This is a homework not in any book and I'm trying to getstarted.

a) if the forward push on the car is 12,000 N, what is thebackward push on the car?
b) what is the net work done by all the forces acting on itwhile it is accelerating?
c) what is the average power supplied to the car by theforward push of 12,000 N during the 4 s that the car isaccelerating? (1 hp = 746 W)
d) what is the net work done by the force of gravity on thecar while it is accelerating?

Ok, on the first one I tried to find the net force by using akinematic equation and then eliminating that from the given forwardpush to get 1,200 N as backward push. Not sure if it's right.
The second one, I tried to do a motion diagram and add thevarious forces and got 86,400 J but it feels little of a numbersomehow.
The third one, well I'm pretty lost by this point.
I know I need all the previous answers in order to get fromone question to another.
Thanks a bunch for all and any help. :)

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