Physics First What Is a Force

A push or a pull exerted on an object in order to change the object's motion is called...

• a Newton

• a force

• a net force

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NGSS.MS-PS2-2

The SI unit of measure for force.

• Newton

• force

• net force

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NGSS.HS-PS2-1

NGSS.HS-PS2-3

The combination of all forces acting on an object.

• Newton

• force

• net force

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NGSS.MS-PS2-2

Which of the following choices best represents force?

• a push or a pull always causing motion

• a push or a pull always causing acceleration

• a push or a pull acting without an object

• a push or a pull acting on an object

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NGSS.MS-PS2-2

Which of the following best determines the net force when more than one force is acting on an object?

• a combination of all motions of an object

• a combination of all motions of an object in two directions

• a combination of all forces acting on an object

• a combination of forces acting on an object in two directions

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NGSS.MS-PS2-2

When the net forces equal 0 N, they are which of the following?

• balanced

• unbalanced

• a push

• a pull

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NGSS.3-PS2-1

Which of the following always causes change in speed, direction, or both?

• balanced forces

• unbalanced forces

• either balanced or unbalanced forces

• any combination of forces

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NGSS.MS-PS2-2

Which of the following causes an object to start moving?

• balanced forces

• unbalanced forces

• either balanced or unbalanced forces

• any combination of forces

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NGSS.MS-PS2-2

When forces are balanced, the net force equals how many newtons?

• 0

• 1

• 2

• 3

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NGSS.3-PS2-1

How would you find the net force of two dogs pulling in opposite directions?

• Subtract the smaller force from the larger force.

• Add the two forces.

• Subtract the larger force from the smaller force.

• Multiply the forces.

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NGSS.MS-PS2-2