Science Calculations

Analyze: A tug-of-war game where Team 1 pulls with 150 N and Team 2 with a force of 300 N. What is the net force, and which team wins?

• Net force is 150 N, team 1 wins

• Net force is 150 N, team 2 wins

• Net force is 450 N, team 1 wins

• Net force is 450 N, team 2 wins

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Why does a box not move when pushed with 10 N but starts sliding when pushed with 15 N? Relate this to Newton’s Laws.

• The force of 10 N is LESS than the friction force, but 15 N exceeds it thus allowing movement. This is explained in Newton's 2nd Law.

• The box is too heavy to move with 10 N. This explained in Newton's 1st Law

• Newton's Third Law states that objects at rest stay at rest.

• The force of 10 N is greater than the force of friction, thus allowing movement. This is Newton's 3rd Law

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• This is an example of Newton's First Law.
• This is an example of Newton's Second Law.
• This is an example of Newton's Third Law.

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You have a pot of boiling water that just came off of the stove. You place two spoons inside; one made of wood, and one made of metal. You wait 5 minutes and remove both spoons. Which one most likely feels warmer?

• The wooden spoon since wood is a good conductor of heat.

• The metal spoon, since metal is one of the best conductors of heat.

• The metal spoon, since metal is a good insulator of heat.

• The wooden spoon, since wood is a good insulator of heat.

What is the Law of Conservation of Energy?

• The Law that tell us energy cannot be created or destroyed, only changed.

• The Law that tell us Pressure is inversely proportional to temperature.

• The Law that tells us that things with larger masses have more gravitational force

• The Law that tells us that energy can be created, but not destroyed.

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Evaluate: How do convection and radiation transfer heat differently, and identify real-life examples of each.

• Convection transfers heat through direct contact, while radiation transfers heat through electromagnetic waves.

• Convection transfers heat through liquids and gases, while radiation transfers heat through electromagnetic waves which can travel through empty space.

• Convection transfers heat through electromagnetic waves, while radiation transfers heat through fluid movement.

• Convection and radiation both transfer heat through direct contact and can happen anywhere in the universe.

What is the Net Force and the direction of the object's movement as a result of the net force?

• 12N, Right

• 12N, Left

• 4N, Left

• 4N, Right

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

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