physics
posted by Anonymous
A certain sports car accelerates from 0 to 60 mph in 9.0 s (average acceleration = 3.0
m/s2). The mass of the car is 1354 kg. The average backward force due to air drag during
acceleration is 280 N. Find the forward force required to give the car this acceleration.

drwls
F(fwd)  F(bkwd) = M a
Based upon the speed change in 9.0 s, a is actually 2.98 m/s^2, not 3.0. I will use 3.0 anyway. They gave you more information that you need.
Solve for F(fwd)
F(fwd) = 280 + (1354)*(3.0) N 
Sachin
according to newton's second law;it states that
F=ma
therfore,F(force of car)F(force of airdrag)=ma
ie:FF=Ma
inorder to find the "F" transpond one F from left hand side to right hand side.
therfore,F=F+MA
ie:F=280+(1354)x(3.0)
F=4902.
Therfore the force needed to give the car this accelaration=4902. 
Anonymous
Not be that person or anything... but your final calculation is incorrect... it is 4342.

Anonymous
my teacher book is the answer is 4.4e3
Respond to this Question
Similar Questions

Physics
Top fuel drag racer can reach the maximum speed of 304 mph at the end of the 1/4mile (402 m) racetrack. (a) Assuming that the acceleration is constant during the race, calculate the average value of the acceleration of the top fuel … 
physics 11
A 1200 kg car on a horizontal surface starts from rest and accelerates uniformly to 72 km/h in 20.0 s. Friction exets an average force of 450 N on the car during this time. a) what is the net work done on the car b) how far does the … 
physics
A 1200 kg car on a horizontal surface starts from rest and accelerates uniformly to 72 km/h in 20.0 s. Friction exets an average force of 450 N on the car during this time. a) what is the net work done on the car b) how far does the … 
AP physics
A 1280kg car starts from rest and accelerates to 80 km/h in 23.0 s. Friction exerts an average force of 449 N on the car during this time. (a) What is the net work done on the car? 
Physics
A bank robber in a getaway car approaches an intersection at a speed of 45 mph. Just as he passes the intersection, he realizes that he needed to turn. So he steps on the brakes, comes to a complete stop, and then accelerates driving … 
physics
The wheels of a midsize car exert a force of 2100 N backward on the road to accelerate the car in the forward direction. If the force of friction including air resistance is 250 N and the acceleration of the car is 1.80 m/s2, what … 
physics
a car travels on a straight road. a) starting from rest, the car is going 44 ft/s (30 mi/h) at the end of 5.0 s. What is the car's average acceleration in ft/s^2 b) in 4.0 more seconds, the car is going 88 ft/s (60 mi/h). what is the … 
physics
A car traveling due east at 20 m/s reverses its direction over a period of 10 seconds so that it is now traveling due west at 20 m/s. What is the direction of the carâ€™s average acceleration over this period? 
Physics
A car of mass 1000kg is travelling along a straight flat road at a constant speed of 30.0ms^1. It then accelerates with constant acceleration of 3.00ms^2 for 10.0s, after which it continues to travels at a constant speed. Determine: … 
physics
A Lamborghini sports car can accelerate from zero to 60 mph in 4 seconds. It can decelerate from 60 mph to rest in 120 ft. What is the ratio of average acceleration over average deceleration?