Physics Semester 2 Concepts & Vocab

What is the concept of universal gravitation?

• The force that objects exert on each other due to their masses.

• The force that objects exert on each other due to their charges.

• The force that objects exert on each other due to their velocities.

• The force that objects exert on each other due to their temperatures.

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NGSS.MS-ESS1-2

NGSS.MS-PS2-4

NGSS.MS-PS2-5

What is the relationship between the force of gravitational attraction and the distance between two objects?

• The force is directly proportional to the distance.

• The force is inversely proportional to the square of the distance.

• The force is inversely proportional to the distance.

• The force is directly proportional to the square of the distance.

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NGSS.MS-ESS1-2

What does centripetal mean? What is centripetal force?

• Centripetal means moving away from the center; centripetal force is the force that pushes objects outward.

• Centripetal means moving towards the center; centripetal force is the force that keeps objects moving in a circular path.

• Centripetal means moving in a straight line; centripetal force is the force that keeps objects moving in a straight path.

• Centripetal means moving in a random direction; centripetal force is the force that keeps objects moving randomly.

Explain why an object moving in a circle at a constant speed is accelerating.

• Because its speed is changing.

• Because its direction is changing.

• Because its mass is changing.

• Because its temperature is changing.

What does it mean that a centripetal force must “have a source”?

• It means that centripetal force can exist without any other forces.

• It means that centripetal force is a fundamental force of nature.

• It means that centripetal force is always provided by another force, such as tension, gravity, or friction.

• It means that centripetal force is always provided by the object's own inertia.

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NGSS.MS-PS2-5

Explain why a car turning in a circle at a high speed can slip.

• Because the centripetal force is too strong.

• Because the frictional force is not strong enough to provide the necessary centripetal force.

• Because the car's mass is too large.

• Because the car's speed is too low.

Tags

NGSS.MS-PS2-5

Explain why astronauts orbiting the earth appear to be weightless. Is the force of gravity between the astronaut and the Earth zero?

• Astronauts appear weightless because there is no gravity in space; the force of gravity is zero.

• Astronauts appear weightless because they are in free fall, constantly falling towards the Earth but never hitting it; the force of gravity is not zero.

• Astronauts appear weightless because they are moving away from the Earth; the force of gravity is zero.

• Astronauts appear weightless because they are moving towards the Earth; the force of gravity is not zero.

What happens on the atomic level when an object increases in temperature?

• Atoms move slower

• Atoms move faster

• Atoms stop moving

• Atoms remain stationary

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NGSS.MS-PS1-4

What will happen when a high temperature object comes into contact with a low temperature object?

• The high temperature object will get hotter

• The low temperature object will get colder

• Heat will transfer from the high temperature object to the low temperature object

• No heat transfer will occur

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NGSS.MS-PS1-4

NGSS.MS-PS3-3

What is the difference between Temperature, Heat, and Thermal Energy?

• Temperature is a measure of heat, heat is energy in transit, and thermal energy is the total energy of particles

• Temperature is the total energy of particles, heat is energy in transit, and thermal energy is a measure of heat

• Temperature is energy in transit, heat is the total energy of particles, and thermal energy is a measure of heat

• Temperature is a measure of heat, heat is the total energy of particles, and thermal energy is energy in transit

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4