What is the speed of an object that moves 40 meters in 4 seconds? (don't forget units!)
10 m/s
200
A change in position over time.
Motion
200
Force that opposes the motion of one object moving past another. Generates heat.
Friction
200
Stored energy
Potential Energy
200
A wheelbarrow is an example of this type of simple machine.
Lever
200
An object goes from 10 mph to 30 mph in 10 seconds. What is the objects acceleration? (Don't forget the units!"
2 mph/s
300
Measurement that combines both speed and direction of a moving object.
Velocity
300
Two forces pushing against one another from opposite directions with the same strength.
Balanced forces
300
Energy of Movement.
Kinetic Energy
300
The point around which a lever pivots is called the ________.
Fulcrum
300
What do we call 2 or more simple machines combined together?
Compound machines
400
Distance/time Measures how fast something is traveling
Speed
400
Name given to the initial push of one object on a second object.
Action Force
400
What is an example of kinetic energy?
Answers may vary: something must be moving
400
An axe used for chopping wood is an example of this kind of simple machine.
Wedge
400
A force that causes an object to change its motion.
Unbalanced force
500
Mass x Velocity. Affects how easily one object can move other objects.
Momentum
500
Name one of Newton's 3 laws.
1: Object at rest stays at rest, object in motion stays in motion
2: Unbalanced force is equal to mass of object multiplied by the objects acceleration. F=MxA
3. All forces have equal and opposite forces
500
What does the law of conservation of energy tell us?
Energy isn't created or destroyed; it just changes forms
500
The ratio of input energy to output work, usually written as a percentage.
Efficiency
500
Which "class" of lever would a fishing pole fit in?