Understanding Forces in Physics

What are the two main categories of forces in physics?

• Contact forces and field forces

• Gravitational forces and magnetic forces

• Static friction and kinetic friction

• Normal force and tension force

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NGSS.MS-PS2-5

Which of the following is a field force?

• Air resistance

• Spring force

• Magnetic force

• Tension force

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What determines the weight of an object?

• The amount of matter in the object

• The gravitational field strength

• The object's volume

• The object's density

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NGSS.MS-PS2-4

What happens when opposite poles of magnets are near each other?

• They repel each other

• They attract each other

• They exert no force

• They cancel each other out

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Which type of friction acts when surfaces slide past each other?

• Static friction

• Kinetic friction

• Normal force

• Tension force