(Savvas 12.4) Chapter 12: Universal Forces

Which of the following is one of the four universal forces?

• a. Centripetal Force

• b. Magnetic Force

• c. Centrifugal Force

• d. Weak Nuclear Force

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NGSS.MS-PS2-4

Is the following sentence true or false? Electromagnetic force is associated with charged particles.

• True

• False

Objects with like charges _______________ one another, and objects with opposite charges _______________ one another.

• repel; attract

• attract; repel

• neutralize; attract

• repel; neutralize

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The force that holds particles in the nucleus together is the _______________.

• strong nuclear force

• centrifugal force

• gravitational force

• electromagnetic force

7. What evidence suggests that nuclear forces have a powerful force of attraction?

• The ability of nuclear forces to bind repellant protons in the nucleus

• The repulsion between protons in the nucleus

• The decay of radioactive elements

• The emission of alpha particles

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NGSS.HS-PS1-8

Over extremely short distances, approximately how many times stronger is the strong nuclear force than the electric force of repulsion?

• 10

• 100

• 1000

• 10,000

Compare and contrast the strong and weak nuclear forces.

• The strong nuclear force is responsible for holding the nucleus together, while the weak nuclear force is responsible for radioactive decay processes.

• The strong nuclear force is responsible for radioactive decay processes, while the weak nuclear force holds the nucleus together.

• Both forces are responsible for holding the nucleus together.

• Both forces are responsible for radioactive decay processes.

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NGSS.HS-PS1-8

State Newton’s law of universal gravitation.

• Every particle of matter in the universe attracts every other particle with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

• Every object in a state of uniform motion will remain in that state of motion unless an external force acts on it.

• For every action, there is an equal and opposite reaction.

• The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

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NGSS.MS-PS2-4

Choose the letter(s) of each sentence that is true about gravitational force.

• The closer two objects are to one another, the weaker the gravitational force.

• The farther apart two objects are, the weaker the gravitational force.

• The greater the mass of an object, the stronger its gravitational force.

• Earth’s gravitational force is stronger than the gravitational force of the sun.

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The gravitational force of attraction between two objects depends on _______________ and _______________.

• the masses of the objects and the distance between them.

• the color of the objects and the distance between them.

• the temperature of the objects and the distance between them.

• the shape of the objects and the distance between them.

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NGSS.MS-PS2-4