Science Madness
What is the rate of doing work (or work per time)?
Power.
A device that helps make a work easier to perform:
Simple machine.
Total energy of the particles in an object, when it increases the object becomes warmer:
Thermal energy.
Energy is measured in:
Joules.
A material formed hundreds of millions of years ago, that stores chemical potential energy:
A fossil fuel.
The amount of work you do depends on both the amount of ______________ you exert, and on the distance the object moves.
Force.
The amount of work done on a machine:
Input force.
Stored energy is called:
Potential energy.
A _________________ is a flat, slanted surface.
Inclined plane.
The amount of work done by a machine:
Output force.
In Science: You hold a heavy piece of wood in place. Is it work?
No, because there is not any distance traveled.
A rope or chain wrapped around a grooved wheel is called a:
Pulley.
In Science the ability to do work is:
Energy.
The main type of energy of stereos and computers is:
Electrical energy.
Energy that is possessed by an object due to its motion or due to its position:
Total energy of a system.
Power is measured in units called:
Watts.
When a machine takes a small input force and increases the magnitude of the output force, _____________ has been produced.
Mechanical advantage.
They contain energy that came from the sun, they can be burned, examples: coal, petroleum, natural gas.
Fossil fuels.
A lever rotates around a fixed point called the:
Fulcrum.
Potential energy with the formula PE=mgh involves:
Mass, gravity and height.
A change from one form of energy to another is called:
Energy transformation.
Machines make work easier by:
1) Increasing the magnitude of the force.
2) Changing the direction of the force.
3) Increasing the distance or the speed of the force.
4) Transferring the force.
Moving energy is correctly termed as:
Kinetic energy.
It states that when one form of energy is transformed to another, no energy is destroyed in the process:
Law of conservation of energy.
Kinetic energy with the formula KE=1/2mv² involves:
Mass and velocity of the object.