Forces - Friction - Gravity

What is a contact force?

• Any force that touch directly.

• Any force that does not touch directly.

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The picture shows a...

• Balanced force.

• Unbalanced force.

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The picture shows a....

• Balanced force.

• Unbalanced force.

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When you push a ball with a bat,...

• It will fall down immediately.

• It will change direction.

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NGSS.MS-PS2-2

What force pull objects down to earth?

• Friction force.

• Gravity force.

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Which objects are pushing or pulling each other?

• The dog and the clouds.

• The dog and the grass.

• The dog and the bird.

Examples of non-contact forces?

• Friction.

• Gravity.

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Which force cause motion?

• Balanced force.

• Unbalanced force.

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Find the (net force) between the dog (10 N) and the horse (40 N).

• 10 N

• 40 N

• 30 N

Answer explanation

They are in (opposite directions) we use "minus - "

40 N - 10 N = 30 N

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What is friction?

• Is a force that slow down moving things.

• Is a force that speed up moving things.

• Is a force that pull down things to earth.