Question

a car is moving at 4m/s has 500N force driving it forward and air resistance of 500N. Describe the motion of the car

Answer 1

See the explanation below.

Step-by-step explanation:

We know from Newton's second law that the sum of forces on a body is equal to the product of mass by acceleration. In this way, we have the following equation.

∑F = m*a

where:

∑F = sum of the forces [N] (units of Newtons)

m = mass of the car [kg]

a = acceleration [m/s²]

Therefore we have two forces one that drives the car forward and another that opposes the movement.

`500-500 = m*a\\m*a=0\\a=0`

This tells us that the acceleration is zero and therefore the movement is with constant speed. That is, the speed does not vary during the movement of the vehicle.