Question

A vehicle of known mass accelerates along a straight path. According to Newton's second law of motion, what caused this acceleration?

Question 1 options:

An unbalanced force has acted on the vehicle.


A balanced force has acted on the vehicle.


The mass of the vehicle has changed.


The direction of the vehicle has changed.

Answer 1

According to Newton's second law of motion, the acceleration of an object is caused by an unbalanced force acting on it. Therefore, the correct answer is:

**An unbalanced force has acted on the vehicle.**