Universal Forces

Select the answers that correctly describe magnets 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 ___________________

• strong nuclear force

• weak nuclear force

• gravitational force

• electromagnetic force

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

• 10

• 100

• 1000

• 10000

Tags

NGSS.HS-PS2-4

Select the answer(s) that are 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

Tags

NGSS.HS-PS2-4

Is the following sentence true or false? The gravitational pull of the moon is the primary cause of Earth's ocean tides.

• true

• false

Tags

NGSS.HS-PS2-4

The sun's mass is much greater than the mass of Earth, so the sun's gravitational force is much _____________________ than that of Earth.

• stronger

• better

• weaker

• heavier

Tags

NGSS.HS-PS2-4

The apple falls from the tree due to the effect of ……..

• Earth's gravitational force

• electromagnetic force

• weak nuclear force

• strong nuclear force

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

If the mass of an object is 2 Kg and the Eath's gravitaional acceleration is 10 m/s2, the object's weight equals …….

• 0.2 Newton

• 2 Newton

• 20 Kg

• 20 Newton

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

Fundmental forces in nature are…..

• Gravitational forces

• Electromagnetic forces

• Nuclear forces

• all the previous

Tags

NGSS.HS-PS2-4

NGSS.HS-PS2-5

Which of the following is a universal force that acts over the longest distance?

• Gravitational force

• Electromagnetic force

• Strong nuclear force

• Weak nuclear force

Tags

NGSS.HS-PS2-4