Forces and Motion

A push or pull on an object is called a:

• force
• magnetism
• friction
• gravity

The motion of an object can be described by all of the following EXCEPT:

• speed
• position
• directions
• force

What occurs when one force is greater than its opposite force?

• a balanced force
• gravity
• an unbalanced force
• nothing

Which force is produced when objects touch each other?

• gravity
• friction
• magnetism
• an unbalanced force

Which of the following CANNOT occur as a result of unbalanced forces?

• the object's motion can speed up
• the object's motion can stay the same
• the object's motion can slow down
• the object's motion can stop

All of the following can change the effects of friction EXCEPT:

• amount of time something is in motion
• texture of the surface
• amount of surface area
• lubrication

What happens to the speed of an object as the force that is acting on it is increased?

• the object's speed decreases
• the object's speed stays the same
• the object's speed increases
• the object's speed decreases, then increases

If the force acting on an object remains the same, what happens to the speed of an object as the objects mass increases?

• the speed will increase
• the speed will decrease
• the speed will stay the same
• the speed will not be affected

In order to graph an object's speed, you must know which of the following?

• time and position
• time and speed
• direction and position
• time and force

A force that is equal in size and opposite in direction is known as:

• an unbalanced force
• a balanced force
• gravity
• magnetism