Non Contact Forces Practice Quiz

All of the following are non-contact forces EXCEPT:

• Magnetic

• Electric

• Gravitational

• Thermal

Repulsion is a:

• pulling force

• heating force

• pushing force

• cooling force

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Electric charges that are the same:

• Attract each other

• Repel each other

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A non-contact force is:

• a force between two objects that aren't touching

• a force between two objects that are touching

• a force between the ground and the air

• a force like an earthquake

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What is a force?

• when an object moves up and down

• when an object goes in and out

• a push or a pull

• hot and cold temperatures

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The area of a magnet where the magnetic field is the strongest is:

• at the poles

• in the middle

• at the north pole because that is where the field lines start

• at the south pole because that is where the field lines end

Based on the arrangement of the electric field lines in the diagram, which statement is true?

• There are two of the same charges.

• There are two oppositely charged particles

• There are two magnets with opposite poles facing each other.

• There are two masses with gravity near each other.

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What is the difference between MASS and WEIGHT?

• Mass DOES NOT change if the force of gravity changes. Weight DOES change if the force of gravity changes.

• Mass DOES change if the force of gravity changes. Weight DOES NOT change if the force of gravity changes.

• Mass is related to gravity while weight is not.

• Mass and weight BOTH change if the force of gravity changes.

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How does gravity differ from magnetic and electric forces?

• Gravity is only attractive but magnetic and electric are both attractive and repulsive

• Gravitational forces only work on solid objects but magnetic and electric forces can work on anything.

• Gravity must be close to be felt but electric and magnetic forces can be felt from far away.

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What is the unit of a force?

• kilometer (km)

• Newton (N)

• kilogram (kg)

• pound (lb)