a force pushing on the object from the opposite direction a force that continually acts on the object in the direction the object is moving an increase in the mass of the object a decrease in the mass of the object
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: What can cause a moving object to increase its speed in a forward direction?
Possibilities:
- a force pushing on the object from the opposite direction
- a force that continually acts on the object in the direction the object is moving
- an increase in the mass of the object
- a decrease in the mass of the object

a force that continually acts on the object in the direction the object is moving