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Vocabulary
Vocabulary
Work and Energy
Motion and Forces
Simple and Compound Machines
100
What is the force that acts over a distance and pulls all objects together?
Gravity
100
Two or more simple machines form a __________________.
Compound machine
100
True or False Energy cannot change from potential to kinetic.
False
100
What are forces that are equal in size and opposite in direction?
Balanced Forces
100
Which is an example of a compound machine? A. wedge B. scissors C. pulley D. wedge
B. scissors
200
What is the distance an object moves in a certain amount of time?
Speed
200
What is the ability to do work?
Energy
200
When an object is moving, it has energy of motion? What kind of energy is this?
Kinetic Energy
200
What are forces not equal in size, or opposite in direction?
Unbalanced Forces
200
A ramp is an example of what simple machine?
Inclined plane
300
What is a change of speed or direction of an object's motion?
Acceleration
300
A push or pull is a __________________.
Force
300
What is stored energy?
Potential Energy
300
When two children of equal weight sit at opposite ends of the seesaw, what kind of force do they create?
Balanced forces
300
A ceiling fan is an example of what kind of simple machine?
Wheel and axle
400
What is a force that works against motion?
Friction
400
____________________ is a force used to move an object a certain distance.
Work
400
Name 2 forms of energy (not potential or kinetic).
-Chemical energy -Electrical energy -Light energy -Mechanical energy -Thermal energy -Nuclear energy
400
Force is measured in units called _________________.
Newtons
400
What simple machine forms when you put two inclined planes back to back?
Wedge
500
What is an object's speed and direction of motion?
Velocity
500
What is the tendency of an object in motion to stay in motion or of an object at rest to stay at rest?
Inertia
500
Work involves all of these except A. time B. movement C. distance D. force
time
500
How can you determine the speed of a moving train?
Divide the distance traveled by the time spent moving
500
What simple machine has two parts: a bar and a fixed point called a fulcrum?
Lever