Gravitation & Coulomb

The Earth exerts a gravitational force of 12 N upon satellite B. Satellite A is twice as far away from the Earth as satellite B. Determine the gravitational force the Earth exerts on satellite A.

• 3 N

• 6 N

• 12 N

• 24 N

Tags

NGSS.HS-PS2-4

The picture shows two situations of two objects gravitationally attracting each other. What is the proportional change in the second mass of situation 2 as compared to situation 1?

• 1/2

• 1

• 3

• 6

Tags

NGSS.HS-PS2-4

The electrostatic force between two charges located 2 meters apart is 0.10 N.  What will the force be between these charges when they are located 1 meter apart?

• 0.40 N
• 0.20 N
• 0.10 N
• 0.05 N

Tags

NGSS.HS-PS2-4

A 2-C charge and a 4-C charge attract each other with 10 N of force.  How much will a 2-C charge and an 8-C charge attract each other when placed the same distance apart?

• 40 N
• 20 N
• 10 N
• 8 N

Tags

NGSS.HS-PS2-4

According to Coulomb's law, you can do all of the following to increase the electric force of repulsion EXCEPT

• Increase charge 1
• Increase charge 2
• Decrease the distance
• Increase the distance

Tags

NGSS.HS-PS2-4

2 charges are 20 cm apart and feel a force of 500 N. if the distance between them becomes 60 cm, what is the new force

• 4500

• 540

• 1500

• 55.6

Tags

NGSS.HS-PS2-4

The picture shows three objects gravitationally interacting with each other. Which object exerts the greatest force on object B?

• Object A

• Object C

• A and C exert an equal force on B

• Cannot be determined

Tags

NGSS.HS-PS2-4

Calculate the force exerted between two charged objects separated by a distance of 0.6 m. One object has a charge of -5 C and the other has a charge of +2.0 C.

• -1.5E-11 N

• 2.5E-11 N

• -2.5E11 N

• -7.5E-10 N

Tags

NGSS.HS-PS2-4

During a physics lab, a plastic strip was rubbed with cotton and became positively charged. The correct explanation for why the plastic strip becomes positively charged is that ...

• the plastic strip acquired extra protons from the cotton.

• the plastic strip acquired extra protons from the charging process

• protons were created as the result of the charging process

• the plastic strip lost electrons to the cotton during the charging process

An electrostatic force of magnitude F exists between two metal spheres having identical charge q. The distance between their centers is r. Which combination of changes would produce NO CHANGE in the electrostatic force between the spheres?

• doubling q on both spheres while halving r

• doubling q on one sphere while halving r

• doubling q on one sphere while doubling r

• doubling q on both spheres while doubling r