A vehicle of known mass accelerates along a straight path.
What cased this acceleration, according to Newton's second law of motion?
Responses
An unbalanced force has acted on the vehicle.
An unbalanced force has acted on the vehicle.
A balanced force has acted on the vehicle.
A balanced force has acted on the vehicle.
The direction of the vehicle has changed.
The direction of the vehicle has changed.
The mass of the vehicle has changed.
The mass of the vehicle has changed.