Newton's Laws
If a box is being pushed against with 10 Newtons to the left and 15 Newton’s to the right, are the forces balanced?
No
True or False: Energy can be created or destroyed.
False
Will two north poles of magnets attract or repel each other?
Repel
What must velocity include?
Speed (magnitude) and direction
Which type of energy is moving energy?
Kinetic energy
What type of charge (positive, negative, or neutral) do electrons have?
Negative charge
Do objects stick together during an elastic or an inelastic collision?
Inelastic collision
What factors affect the amount of potential energy in an object? (must have all 3 to be correct)
mass, gravity, and height
What do you call the category of materials that do not allow electrons to flow through them?
Insulators
What is the net force acting on an object that is pushed to the left with a force of 8 Newtons and pushed to the right with a force of 3 Newtons?
5 Newtons to the left
What type(s) of energy are affected by mass?
Kinetic energy and Potential energy
What is electric current?
The flow of electrons
What is Newton’s 2nd law of motion?
F = m a
If a ball loses 5 Joules of potential energy for every step it falls down, how much kinetic energy has it gained after falling down 4 steps?
20 Joules of energy
What are three ways to increase the strength of an electromagnet?
1. Increase the current/voltage
2. Increase the number of batteries
3. Increase the number of coils in the wire