Types of Forces
Which type of force resists motion when two surfaces rub against each other?
Frictional force
Two students push a box in the same direction. One pushes with 50 N and the other with 30 N. What is the net force on the box?
80 N
A book is resting on a table and not moving. What kind of forces are acting on it?
Balanced Force
When you jump off a small boat, the boat moves backward. Which law does this demonstrate?
Newton's Third Law of Motion
What force pulls objects toward the center of the Earth?
Gravity
Two students push a box from opposite sides—one with 60 N to the right and the other with 40 N to the left. What is the net force and direction?
20 N to the right
A soccer ball speeds up after being kicked. Which statement describes the forces acting on it?
Unbalanced force
According to Newton’s Third Law, if you push on a wall with a force of 30 N, the wall pushes back with:
30 N in the opposite direction
When you push a box across the floor, what type of force are you applying?
Applied force
A horse pulls on a cart with a 200-N force to the left, but neither the horse nor the cart moves. Based on your knowledge of Newton’s third law of motion, identify the reaction force.
200 N to the right
A magnet pulling a paperclip is an example of which type of force?
Magnetic force