Question

4. An object that is accelerating may be

slowing down.
gaining speed.
changing direction.
all of the above

5. Which of the following statements is true?


An object has an instantaneous acceleration, even if the acceleration vector is zero.
An object at rest has an instantaneous acceleration of zero.
Instantaneous acceleration is always changing.
all of the above

6. The forces acting on a falling leaf are


air resistance and fluid friction.
gravity and air resistance.
gravity and static friction.
weight and rolling friction.

7. The property of matter t