Kinetic & Potential Energy
Example of kinetic energy?
What does Newton's 1st Law state?
Law of Inertia.
Objects in motion will stay in motion & objects at rest will stay at rest unless acted upon by an unbalanced force.
What is static electricity?
The build up of electric charges on an object.
What is current electricity?
The flow of electrons along a complete, closed path
What do waves carry?
Energy
Example of potential energy?
Anything at rest
What does Newton's 2nd Law state?
Law of Acceleration.
Objects with more mass take more force to accelerate.
When an object gains or loses electrical charges, what happens?
The object becomes charged, and will attract to opposite charges
What are the THREE components necessary to form an electrical circuit?
A power source, a load (which uses the electricity) and a path for the electrons to flow. Example of a power source: battery
What are the two types of waves?
transverse & longitudinal
What two factors does kinetic energy depend on?
Mass & Speed
What does Newton's 3rd Law state?
Law of Action/Reaction
Every action has an equal and opposite reaction.
Opposites _________
Similar __________
attracts
repels
What is the difference between an open circuit and a closed circuit?
In an open circuit, the path is not complete, and electricity will not flow. In a closed circuit, the path is complete, and the electricity will flow.
The highest point & lowest point of a transverse wave
crest & trough
What two factors does potential energy depend on?
Mass & Distance
What is inertia? How does mass affect inertia?
The tendency of an object to resist a change in motion. More mass=more inertia
Where is the force of a magnet the strongest?
The force is strongest at the poles.
Explain the path that electrons flow in a series circuit. What will happen if one of the light bulbs in this type of circuit goes out? Explain why.
The electricity flows along a SINGLE pathway. If one light bulb goes out, it opens the circuit and all the lights will go out.
Describe how matter moves from the resting position with each type of wave
Transverse- perpendicular (or 90 degree angle)
Longitudinal- parallel
What happens to the potential energy in a roller coaster if you increase the height of a hill?
Potential energy increases
Describe two things you can do to increase the acceleration of an object.
You can lower the mass of the object or you can increase the force acting on the object. (Third- you could reduce the friction!)
What is the difference between permanent magnets and temporary magnets?
Permanent magnets keep their magnetic properties for a very long time. Temporary magnets lose their magnetic properties quickly
Explain the path that electrons flow in a parallel circuit. What will happen if one of the light bulbs in this type of circuit goes out? Explain why
The electricity flows along more than one pathway. If one light bulb goes out, the others will stay lit.
How to measure the wavelength in a longitudinal wave
From compression to compression