Forces Review

Two children climb onto a seesaw. You conclude that the right side of the seesaw moves down.

• Gravity only acts on one child causing the forces to be unbalanced.

• The child on the left has a greater mass, leading to unbalanced forces.

• The child on the right has a greater mass, leading to unbalanced forces.

• Both children have the same mass, leading to balanced forces.

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

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Which action can help the rowing team increase speed?

• Add more weight to the boat.

• Stop rowing.

• Have each team member use only one oar.

• Increase the force applied to the oars.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Some students are cycling to school. What explains why cycling is more difficult on windy days?

• The wind pushes the bicycle forward.

• The wind opposes the pedaling force.

• Pedaling creates friction that helps the bicycle grip the road.

• Cycling on a rough surface is more difficult than on a smooth surface.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A gymnast is standing on a balance beam. Is gravity the only force acting on her?

• True

• False

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NGSS.MS-PS2-2

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Which scenario is an example of an unbalanced force?

• a lion taking off to catch its prey

• a rope staying in place between two teams in a tug-of-war

• a weightlifter holding weights above their head

• a bridge suspended from cables between two towers

Tags

NGSS.MS-PS2-1

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A soccer ball is lying on the field. What statement can you make?

• Gravity does not act on the ball.

• No forces are acting on the ball.

• Unequal forces are acting on the ball.

• Balanced forces are acting on the ball.

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NGSS.MS-PS2-2

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A boy pulls a rope with less force than a dog. How do these forces affect the movement of the rope?

• • The rope will move back and forth between the boy and the dog.

• The rope does not move in any direction.

• The rope moves in the direction of the dog.

• The rope moves in the direction of the boy.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A boy is flying a kite. Which statements can be made about the forces acting on the kite? (Select 3)

• The wind pushes the kite away from the boy.

  
  

• Gravity is pulling the kite down.

  
  

• The string pushes the kite away from the boy.

  
  

• • The string pulls the kite towards the boy.

  
  

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A baseball is hit into the air. What force causes the ball to fall to the ground?

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NGSS.MS-PS2-4

A student wants to investigate how mass can affect the motion of an object. Which experiment is the best?

• Roll balls of different masses down slopes with different surfaces.

  
  

• Roll balls of different masses on three different surfaces.

  
  

• Roll balls of different masses from the top of a slope at the same time.

  
  

• • Roll balls of the same mass on a carpet.

  
  

Tags

NGSS.MS-PS2-2