Types of Forces
What force happens when a person pushes a box?
Applied Force
A book rests motionless on a desk. Are the forces balanced or unbalanced?
Balanced
A student pushes a box right with 5 N. Another student pushes right with 3 N. What is the net force?
8N to the right
What happens to an object at rest when the forces on it are balanced?
Stays at rest
I will take doesn't move
Is applied force a contact force or a non-contact force?
Contact
What force pulls an object toward the center of Earth?
Gravity
A soccer ball speeds up when kicked. Are the forces balanced or unbalanced?
Unbalanced
A toy car is pushed right with 10 N and left with 4 N. What is the net force?
6N to the right
What can happen when unbalanced forces act on a moving object? (Be specific)
Is gravity a contact force or a non-contact force?
Non-contact force
What force acts opposite the motion of a sliding or rolling object?
Friction
Two teams pull a rope with equal force in opposite directions. What is the net force?
0 N
Two people push a cart left with 7 N and 6 N. What is the net force?
13N to the left
A ball rolls across the gym floor and gradually stops. What force helps slow it down?
Friction
Is friction a contact force or a non-contact force?
Contact force
What force does a table exert upward to support a textbook?
Normal Force
A car slows down when the driver applies the brakes. What type of forces cause this change in motion and is it balanced or unbalanced?
Friction, Unbalanced forces
A box is pulled right with 15 N and left with 15 N. What is the net force?
0N
A basketball rolls faster down a ditch. What force helps pull it downhill?
Gravity
A magnet attracts iron filings through a sheet of paper. What type of force is acting AND is it contact or non-contact?
Magnetic force, a Non-contact force
What non-contact force can attract or repel objects using magnetic poles?
Magnetic Force
An object moves in a straight line at a constant speed. Balanced or Unbalanced?
Balanced
A sled is pulled right with 20 N and left with 8 N. What is the net force and direction?
12N to the right
What happens to an object’s velocity when an unbalanced force acts on it?
Changes speed or direction
A textbook rests on a table. Name the downward force and the upward support force acting on it.
Downward- Gravity
Upward- Normal Force