Unit 2 Chapter 3

What forces are causing the swing to move in Figure 1?

• A swing moves up when gravity pushed a person up and the force of gravity pulls the swing down.

• A swing moves down when a person pushes up with his legs and the force of gravity pulls the swing up.

• A swing moves up when a person pushes up with his legs and the force of gravity pulls the swing down.

• The swing moves up when the forces are balanced.

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Which statement best describes how gravity affects motion?

• Gravity pulls objects toward each other.

• Gravity pushes objects away from each other.

• Gravity must have contact with the object to move it.

• Gravity cannot affect motion.

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#5? Rain is coming out of the cloud. What will happen to the rain as it falls from the cloud?

• It will go up.

• It will go down.

• It will go backward.

• It will stay in the air.

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The image below shows a path being blocked by a fallen tree.  The tree is firmly planted onto the ground. A group of hikers want to get past the tree.  The tree will need to be moved.  First, the hikers must identify the type of force that is acting on the tree.  There are different kinds of forces.

Choose 2 forces that are acting on the tree.

• The tree is being kept in place by a push.

• The tree is being kept in place by a pull

• The tree is being kept in place by gravity.

• The tree is being kept in place by a magnet

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NGSS.3-PS2-1

A tree has fallen in the woods, blocking the path of some hikers. The hikers realize that lifting the tree off the ground will give them the most access to the path.  Which statement best describes the kind of force needed to lift the tree off the ground? 

• A force that is similar to gravity.

• A force that is weaker than gravity.

• A force that is stronger than gravity.

• A force that is just as strong as gravity

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 Choose two types of forces that are acting on this falling block

• Pull

• non-touching

• touching

• push

• magnetic

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what caused the person to start moving?

• Magnetic force

•  Balanced force

•  Gravity

• Push

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Which claim is NOT correct?

• Gravity and magnetic force are the same because they are both touching forces.

• Gravity and magnetic force are the same because they both can attract.  

• Gravity and magnetic force are different because gravity can't repel. 

• Gravity is exerted on all objects, but magnetic force is only exerted on some.

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What two forces are acting on the block in the diagram?  Choose 2.

• Magnetic force

• Touching force

• Gravity

• Push

• Repelling force

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NGSS.MS-PS2-4

Which of the following describe the force of gravity? Choose 3

• Non-touching

• Touching force

• Attracting force

• Pulling force

• Repelling force

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