1.a car moves at a constant velocity up an inclined plane angle of 28 degrees with the horizontal.The coefficient of friction is 0.387. The force exerted by the engine on the car is 588N...

A.Calculate the of the car?
B. Frictional force acting on the car

Yes it is physical science

First step: draw a free body diagram, showing

1. W=mg
2. down-plane component: mg sin(θ)
3. normal component, N: mg cos(θ)
4. friction (parallel to plane, downwards) = μN
5. applied force, F=588 N

Since car is moving up the plane at constant velocity, forces along the plane are in equilibrium, hence
Σ down-plane forces Σ up-plane forces,
or
mg sin(θ)+μN = F
(A)Solve for m (mass of the car).
(B)frictional force actig on the car = μN

If you do not know how to draw a free-body diagram, read:
http://www.physicsclassroom.com/class/vectors/Lesson-3/Inclined-Planes

Thanks so my mass is 157.62kg? Am I correct?

I get about half of that, which is pretty small for a car. A small MG-midget weighs more than that, unless it is an ATV.

Can you check if you have a factor of 2 missing somewhere? If you don't spot it, tell me what you have for N (normal component), the value of g that you use.

I don't have a factor of two for g I used 9.8?

What did you get for N?

I have

m(9.8)sin(28)+m(9.8)cos(28)*0.387=588
from which
m=588/(9.8(sin(28)+0.387cos(28))
Do you have the same expression?

I have this m(9.8)(sin28)+(0.387)m(9.8)(cos28)=588

My mass is 73.96kg just realized now I made an error while pressing the values on my calculator...... Thanks alot

You're welcome! :)

To calculate the weight of the car, you need to know the mass of the car. The weight is equal to the mass multiplied by the acceleration due to gravity (9.8 m/s^2). However, the mass is not given in the question, so unfortunately, we cannot calculate the weight of the car without this information.

To calculate the frictional force acting on the car, we can use the equation:

Frictional force = coefficient of friction * normal force.

The normal force is the force exerted by the surface on the car perpendicular to the incline, which is equal to the weight of the car times the cosine of the angle of the incline.

Given the coefficient of friction (0.387) and the weight of the car (which we can't calculate without the mass), we cannot determine the exact value of the frictional force acting on the car.