Non-Contact Forces

What is a NON-CONTACT force?

• A push or pull force where the objects are not touching

• A push force where the objects are touching.

• An example would be pulling open a door.

• The only type of force that exists in the world.

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What is GRAVITY?

• A force that pushes all objects away.

• A force that attracts all objects toward one another.

• A force that creates magnetic fields.

• The force of electrons spinning in a certain direction.

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NGSS.MS-PS2-5

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As the MASS of an object increases, its gravitational pull _________.

• Stays the same

• Decreases, then increases, then decreases

• Decreases

• Increases

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NGSS.MS-PS2-4

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When two objects are closer to one another, the force of gravity between them ____________.

• Increases

• Decreases

• Stays the same

• Divides by a factor of 100

Tags

NGSS.MS-PS2-4

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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.

• If an object is SMALLER, it always has more mass and less weight than a LARGER object.

What are the poles of a magnet called?

• East and West Pole

• North and East Pole

• North and South Pole

• Up and Down Pole

If you placed two magnets next to one another, and the NORTH poles were facing one another, what would happen?

• The magnets would attract (pull together)

• The magnets would repel (push apart)

• The magnets would explode.

• The magnets would spin out of control.

Tags

NGSS.MS-PS2-5

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What are the three NON-CONTACT forces we are studying this unit?

• Gravity, friction, air resistance

• Forces, motion, human body systems

• Friction, electricity, muscular system

• Gravity, electricity, and magnetism

Tags

NGSS.MS-PS2-5

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If the size of Earth doubled, the Moon would crash into it. Why does this happen?

• The Moon's AIR RESISTANCE becomes too strong.

• The Earth's gravitational pull would INCREASE, pulling the Moon toward it.

• The Earth's gravitational pull would DECREASE, pulling the Moon toward it.

• The Earth's mass would be so small that the Moon would actually drift away.

Tags

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What is ELECTRICITY?

• A non-contact force that attracts and repels magnets.

• A non-contact force caused by the flow of electrons.

• A bend in space that pulls objects toward one another.

• A non-contact force caused by the nucleus of an atom breaking.

Tags

NGSS.MS-PS2-5