Most things people use are:
a. compound machines
b. simple machines
c. levers
d. inclined planes
What are compound machines?
100
The lever, the pulley, and the wheel and axle make up the _____ family.
What is the lever family?
100
Energy is the ability to do ________.
What is work?
100
Kinetic energy produced by vibrating particles.
What is heat energy?
100
Mass cannot be created or destroyed. Name this law.
What is the Law of Conservation of Mass?
200
The most basic machine; does work with one movement
What are simple machines?
200
The _________ ___________ family are the inclined plane, the wedge, and the screw.
What is the inclined plane family?
200
There are two types of energy: kinetic and ___________.
What is potential energy?
200
Potential energy stored in the bonds of atoms and molecules.
What is chemical energy?
200
An object stays at rest and an object in motion keeps a constant velocity unless it is acted on by a force (Inertia). Name this law.
What is Newton's First Law?
300
If you apply a large force to something but it does not move:
a. work has been done
b. no work has been done
c. no energy is lost
d. smile :)
What is no work has been done?
300
A fixed point around which a lever moves
What is fulcrum?
300
The energy a moving object has because it is moving.
What is kinetic energy?
300
Lightning and running a dishwasher produce kinetic energy and are examples of _______ energy.
What is electrical energy?
300
The unbalanced force acting on an object is equal to the object's mass times its acceleration (F=ma). Name this law.
What is Newton's Second Law of Motion?
400
When an object changes its position by moving in the direction of an applied force.
What is work?
400
A wheelbarrow is a combination of a lever and a wheel and axle. This combination of simple machines from the inclined plane and lever family are ________.
What are compound Machines?
400
Stored energy is ________.
What is potential energy?
400
Name three examples of kinetic energy.
What are electrical, heat, and radiant energy?
400
For every action force, there is an equal and opposite reaction force (Launching of a rocket). Name this law.
What is Newton's Third Law of Motion?
500
Helps people do work by redistributing the force that is put into work.
What are machines??
500
The answer to the following 4 fill in the blanks is the same word.
A screwdriver is in the lever family. As _______ is transferred from one part of the bar (the handle) to another (the end of the screwdriver). ________ is multiplied.
AND
Work is done when ______causes a change in the motion of an object in the direction of the applied _______.
What is force?
500
A rubber band has potential energy when it is _________.
What is stretched?
500
Name 4 examples of potential energy.
What are mechanical, chemical, nuclear, and gravitational potential energy.
500
Energy cannot be created or destroyed. It can be converted from one form to another. Energy is neither gained or lost. Name this law.