Mechanics
What is force?
Force is a push or pull on an object.
What is the force that resists movement between two objects?
The force that resists movement between two objects is friction.
What is energy?
Energy is the ability of someone or something to do work.
What is sound?
Sound is a vibration.
In which direction do sound waves travel?
Sound waves travel in all directions.
What is the study of motion?
The study of motion is called mechanics.
What is a lubricant?
What are kinetic energy and potential energy?
Kinetic energy is energy in motion. Potential energy is stored energy.
What phase of matter does sound generally travel through best?
Sound travels best through solids.
What is drag?
Drag is the friction that slows an object as it moves forward through air or water.
How many laws did Isaac Newton discover? State one of the laws.
Isaac Newton discovered three laws.
1st - Something at rest will stay at rest, or something in motion will stay in motion unless effected by an outside force.
2nd - Force = Mass X Acceleration. Force is what causes an object to change speed or direction. The change is resisted by mass.
3rd - For every action, there is an opposite and equal reaction.
They would hit at the same time.
What is the law of conservation of energy?
Energy cannot be created or destroyed, only transformed.
What measurement do we use to measure loudness?
Decibels is used to measure loudness.
What is the speed limit of falling objects?
The speed limit of falling objects is terminal velocity.
Why do books fly forward if they were in your lap when the car suddenly stopped?
They would fly forward because of inertia.
What was the force that was in effect when David was twirling the sling?
The force that was in effect when David was twirling the sling was centripetal force.
What is renewable energy?
Renewable energy is energy that is made from sources that don't run out.
What do we call a sound too high pitched for human ears to hear?
The sound that is too high pitched for human ears to hear is ultrasound.
What is traction?
Traction is the friction between two objects that keeps them from sliding across each other.
What is acceleration?
Acceleration is the change in speed or direction something is going.
What is the law that tells us all objects are attracted to other objects according to their mass and distance?
The law that tells us all objects are attracted to other objects according to their mass and distance is the universal law of gravitation.
Name one form of energy that come from animals and plants buried long ago.
Fossil Fuels: oil, coal, natural gas
What is frequency?
Frequency is the pitch of sound.
What is gravity?