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- 1. Multiple Choice
What caused objects to move?
Unbalanced forces
Acceleration
Velocity
Balanced forces
- 2. Multiple Choice
Forces that are equal in size and opposite in direction are known as
Balanced forces
Net force
friction force
unbalanced forces
- 3. Multiple Choice
Two football linemen push against each other in practice. They do not move, but then lineman B moves forward and lineman A moves backward. Why does this happen?
The forces are balanced, but then line B exerts a greater force, causing unbalanced forces.
When the lineman push on each other, they cause action-reaction forces that are unequal.
Lineman A pushes with a greater force, causing a net force that acts in his direction.
Because the lineman push in different directions, the net force is zero.
- 4. Multiple Choice
You observe two teams in a tug-of-war. The red team is moving towards the blue team with a constant velocity. Which of the following statements must be true?
There are no forces acting on the red team.
The red team is stronger (has a greater pulling force) than the blue team.
The blue team is stronger (has a greater pulling force) than the red team.
There is no net force on the red team.
- 5. Multiple Choice
Which could be an example of an unbalanced force?
A plate sitting on a dining table
A ball at the top of a hill that is not moving
A flower vase on the table
A baseball that has been thrown to home plate.
- 6. Multiple Choice
When one force in a pair is greater than the other, we call this:
Balanced
Unbalanced
Magnitude
Friction
- 7. Multiple Choice
Two equal forces act at the same time on the same stationary object but in opposite directions. Which statement describes the object's motion?
The object changes direction.
The object moves at a constant speed.
The object remains stationary.
The object accelerates.
- 8. Multiple Choice
Why does a book on a table not move?
No forces are acting on the book
Gravity is the only force acting on the book
Forces of the table pushing up and gravity pulling down are balanced.
Nobody is moving the book.
- 9. Multiple Choice
A vase of flowers is stationary on a table. Which of the following statements best explains why the vase is stationary?
Gravity pulling down on the vase and the force of the table pushing up on the vase are equal
There are no forces on the vase.
There are net forces on the vase.
The force of gravity pulls the vase downwards.
- 10. Multiple Choice
Describe the motion of a stationary object if an unbalanced force acts on it
no change
it will accelerate
decelerate
it will accelerate or decelerate depending upon the forces
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