What does F_e stand for?

• the electrostatic force

• the symbol for iron

• the constant for the charges

• the charges of the particles

Tags

NGSS.HS-PS2-4

What does q measure?

• the distance between the two charged objects

• the amount of charge carried by the object

• the amount of force between two charged objects

Tags

NGSS.HS-PS2-4

Why are there two q's in the equation?

• because there are two charged objects

• because there are protons and electrons

• because the particles are moving away from each other

• because the particles are moving towards each other

Tags

NGSS.HS-PS2-4

What can you do to increase the value of k?

• change the force

• change the distance

• change the charge

• nothing can be done to change the value of k; it is a constant

An attractive force exists between which two particles?

• Two neutrons

• An electron and a neutron

• An electron and a proton

• Two electrons

Since Coulomb's Law is written as F_e=k\cdot\frac{q_1\cdot q_2}{d^2} this means that as the distance between the two charged objects gets smaller, the electric force ---

• gets weaker
  

• gets stronger
  

• changes unpredictably
  

• does not change
  

Tags

NGSS.HS-PS2-4

What happens to the force between two charged objects when you double the distance between them?

• 2X

• 1/2X

• 4X

• 1/4X

Tags

NGSS.HS-PS2-4

The force between two point charges is F when they are separated by a distance r.

If the separation is increased to 3r, what is the force between the charges?

• 
• 
• 
• 

The image shows two charged particles with a force of 2.4 N. What would you predict the force of interaction would be when the distance doubles?

• 4.8 N

• 1.2 N

• .6 N

• .3 N

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

Two charges pull on each other with 4.0 µN of force. If one charge is replaced with a charge 8× as big, and the distance is changed to 4× as much, the charges will pull on each other with --- of force.

• 2.0 µN

• 8.0 µN

• 4.0 µN

• 16.0 µN

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5