Forces Quiz

What are the four universal forces?

• Electromagnetic

• Weak nuclear

• Strong nuclear

• Gravitational

• Energy

Electromagnetic force is associated with charged particles.

• True

• False

Which two forces can both attract and repel.

• Electric

• Magnetic

• Energy

• Gravity

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

• speed up, slow down

• hold, let go

• repel, attract

• attract, repel

Circle the letters of the sentences that correctly describe magnetic or magnetic forces.

• Magnetic forces act on certain metals.

• Magnets have two poles, north and south.

• Two poles that are alike attract each other.

• Magnetic forces can both attract and repel.

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

• electromagnetic force

• strong nuclear force

• weak nuclear force

• gravitational force

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

Circle the letter 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.

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

• mass, distance

• distance, shape

• mass, and shape

• weight, distance

Gravity is the weakest universal force, but it is the most effective force over long distances.

• True

• False