It can cause an object to accelerate.
It can cause an object to stop moving
.
It can cause an object to start moving.
It can cause an object to change directions.
Explanation:
We can answer this question by using Newton's second law, which states that:
[tex]F=ma[/tex]
where:
F is the net force acting on an object
m is its mass
a is its acceleration
From the equation, we observe that when there is a net force (= different from zero) acting on an object, then the object has a non-zero acceleration. So, the following statement:
It can cause an object to accelerate.
is correct.
Acceleration is a vector quantity equal to the rate of change of velocity over time:
[tex]a=\frac{\Delta v}{\Delta t}[/tex]
A non-zero acceleration therefore means that the velocity of the object is changing (can be changing either in its magnitude, or in its direction). Therefore, the following statements are also correct:
It can cause an object to stop moving
It can cause an object to start moving.
It can cause an object to change directions.
Since they all involve a change in velocity.
Finally, the last statement is wrong:
It can cause an object at rest to remain at rest.
Because when there is a net force different from zero, there is a non-zero acceleration, so the object cannot remain at rest.
Learn more about Newton's second law and acceleration:
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