Balanced & Unbalanced Forces Review

Two people pull in opposite directions, but neither move positions (see picture). Which of the following BEST describes the forces being applied in this situation?

• The forces are balanced, and the net force is positive.

• The forces are balanced, and the net force is zero.

• The forces are unbalanced, and the person on the left applies a greater force.

• The forces are unbalanced, and the person on the right applies a greater force.

Tags

NGSS.MS-PS2-2

Which of the following examples does NOT represent an object with an unbalanced force?

• A rock falling down a hill

• A football being thrown into the air

• A bicycle sitting on a sidewalk

• A water balloon being launched

Tags

NGSS.MS-PS2-2

Which blocks will move as a result of the forces shown in the diagram?

• Blocks A and C

• Blocks A, B, and C

• Blocks A and B

• Blocks B and C

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

Mrs. Halleran is giving examples of balanced and unbalanced forces. Which of the following situations is an example of unbalanced forces acting upon an object?

• A hose being pulled from both sides with equal force.

• A truck moving at a constant speed of 45 miles per hour.

• A toy car accelerating as it rolls down a ramp.

• A backpack lying on the ground.

Tags

NGSS.MS-PS2-2

Luis is observing a game of Tug-of War. The center of the rope will move when which of the following is true?

• The rope essentially has no mass of its own.

• A player is added to the team on the right.

• One team applies a greater force than the other team.

• There is no friction between the ground and the players.

Tags

NGSS.MS-PS2-2

Which of the following will allow the rope to remain balanced?

• The net force is greater than zero.

• Constant velocity is applied to one side.

• A force causes a change in the motion or direction.

• The force exerted on the rope remains the same.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

Forces that are exerted on an object which are equal in size but opposite in direction

• Unbalanced force

• Balanced force

Tags

NGSS.3-PS2-1

Which of the following examples BEST represents an object with balanced forces acting upon it?

• An airplane taking off.

• A skateboard rolling down hill.

• A tennis ball thrown into the air.

• A dish sitting in a cabinet.

The illustration shows the forces, in Newtons (N), acting on three different blocks. Which blocks WILL move?

• Blocks A, B, C

• Blocks A and C

• Blocks B and C

• Blocks A and B

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

How will this object move? 

• It won't move. 
• It will move to the right. 
• It will move to the left. 
• It will move up. 

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1