Balanced Unbalanced Forces

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
• Earth orbiting the Sun 
• A baseball that has been thrown to home plate.

Calculate the Net Force. 

• 40N, Left
• 40N, Right
• 0N, Balanced
• 75N, Right

When forces are _________ the object DOES NOT move.

• unbalanced
• balanced
• heavy
• light

In which sections of the ramp will skaters experience a balanced force?

• Sections 1, 2, and 3

• Sections1 and 5

• Sections 1, 3, and 5

• Sections 2 and 4

The images below show two people using their hands to control the wheels of their wheelchairs. The man is on a level surface, and the woman is on a ramp.

Which is an accurate description of the forces in the photographs?

• The man has to roll his wheels to move because of the unbalanced forces acting upon the wheels.

• The man has to hold onto his wheels so he does not move because of the unbalanced forces acting upon the wheels.

• The woman has to roll her wheels to move because of the unbalanced forces acting upon the wheels.

• The woman has to hold onto her wheels so she does not go too fast because of the unbalanced forces acting upon the wheels.

Four students are trying to move the spherical object shown above by applying opposing forces from four directions. The force being applied to the object by three of the students is shown. If the object is not moving, what conclusion can be drawn about the size of the force identified as ?N?

• The force is greater than 12N

• The force is 12N.

• The force is less than 7N

• The force is exactly 7N.

What change would result in balanced forces acting on this box?

• Add a force of 5 N pushing to the left

• Add a force of 10 N pushing downward

• Add a force of 5 N pushing to the right

• Remove the 10 N force pushing to the left.

This diagram shows the forces acting on an object.

How will this object act in response to these forces?

• The object will move upward and toward the left.

• The object will move upward only.

• The object will move to the right only.

• The object will move upward and toward the right.