Question

A car has a mass of 1000 kg and accelerates at 2 meters per second per second. what is the magnitude of the net force exerted on the car

Answer 1

F=ma
Therefore the net force = 1000kg × 2 metres per second per second
So F=2000 N

Answer 2

Answer:

The magnitude is $2000N$

Explanation:

To solve this question we are going to use the second Newton law.

The second Newton law states that the acceleration of an object is directly proportional to the net force which acts on the object and inverse proportional to the mass of the object ⇒

$a=\frac{F}{m}$

Which can also be written as :

$F=m.a$ (I)

Where F is the force

Where m is the mass of the object and where ''a'' is the acceleration.

In the problem, we know that

$m=1000kg$

$a=2\frac{m}{s^{2}}$

If we replace in the equation (I) :

$F=(1000kg).(2\frac{m}{s^{2}})=2000(kg.\frac{m}{s^{2}})$

The unit $kg.\frac{m}{s^{2}}$ is defined as N which is called Newton. N is an unit of force.

Finally, the net force exerted on the car is $2000N$