What Determines Changes in Velocity and Acceleration?

[Amel]

Homework Statement

A) If a non-zero net force acts on an object, the object's velocity will change.
B) If a non-zero net force acts on an object, the object's speed will change.
C) A bicycle initially moving at a constant velocity will slow down unless a small net force is applied.
D) If two objects are under the influence of equal forces, they have the same acceleration.
E) During the collision of a car with a large truck, the truck exerts an equal size force on the car as the car exerts on the truck.
F) The net force which acts on an object which maintains a constant velocity is zero.

The Attempt at a Solution

Ok so I need to say if they are true or false.
Im getting the problem wrong but I am not sure on which part.

TTFFTT

A)T
B)T
C)F (im asuming there is no friction, but I am not sure if I can do that)
D)F (no because they could have different mass)
E)T (equal and opposite reaction)
F)T

 

[Doc Al]

Hint: Velocity has both speed and direction. Either speed or direction or both can change as a result of an applied force. (See if you can think of an example of each possibility.)

 

[Amel]

Thanks for that hint I got it.