Newton's 1st & 2nd Law

Are forces balanced or unbalanced when a car is moving at a constant speed in a straight line?

• Balanced
• Unbalanced

Are forces balanced or unbalanced when a marble speeds up rolling down a ramp?

• Balanced
• Unbalanced

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NGSS.MS-PS2-1

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Ted is trying to move a fridge through his house, he gets stuck on a carpet and even though he is pushing the fridge, it is not moving. What force is acting against him?

• gravity
• friction
• air
• mass

A push or pull exerted on an object

• Force
• Net force
• Momentum
• Speed

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

Calculate the net force for the diagram.

• 800 N down unbalanced

• 600N down balanced

• 400 N down unbalanced

• 400 N up unbalanced

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

Calculate the net force for the diagram.

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

When two force act in the same direction, how would you calculate the net force?

• Subtract the forces

• Balance the forces

• Add the forces

• Divide the forces.

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NGSS.MS-PS2-2

The force that keeps objects on top of surfaces instead of letting them sink into the surface is known as:

• Normal Force

• Gravitational Force

• Friction Force

• Air resistance

What is the net force?

• 17 N Right
• 3 N Right
• 3 N Left
• 17 N Left

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NGSS.MS-PS2-2

What is the net force of the block?

• 8N, right

• 2N, right

• 8N, left

• 2N, left

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NGSS.MS-PS2-2