Forces and Motion 1
A push or pull
Force
Student A is pushing a box with a force of 20N to the right. Student B is pushing with a force of 20 N to the right. Will the box move?
yes to the right!
Stored up energy is called...
Potential Energy
Energy in motion is called....
Kinetic Motion
A change in position is called
Motion
Unit of Measurement for Energy
Joules
Forces that cause a change in motion are called..
unbalanced forces
Friction in the air is called...
Air Resistance
Energy can be destroyed
TRUE or FALSE
FALSE
A large rock is motionless on a flat sidewalk. Which statement best explains why the rock remains motionless?
A) There are no forces acting on the rock.
B)The only force acting on the rock is directed toward the sidewalk.
C) The forces acting on the rock are all balanced
D) The sidewalk exerts an unbalanced force on the rock.
C
A force between two surfaces which prevents them from sliding past one another. A force that acts in the opposite direction of the traveling object
Friction
Student A is pushing a box with a force of 20N to the right. Student B is pushing with a force of 25 N to the left. What is the net force of this situation
5 N to the left
In a game of tug-o-war, what happens when the forces exerted by Team A and Team B are balanced?
neither team wins
How are height and potential energy related?
Greater height = greater PE
Besides size/magnitude, what does every force have?
Direction
An object that is accelerating can be
described as a(n) _____________ force.
Unbalanced
Forces on an object that are equal in size and opposite in direction, cancelling each other out are called...
Balanced Forces
As motion increases friction ________.
decreases
When going on a roller coaster, at which point do you have the MOST potential energy?
At the top of the highest hill
What is the Law of Conservation of Energy
Energy cannot be created nor destroyed. Just transformed
Which energy type is missing in the windmill energy transformation?
Mechanical(wind) --> _________ --> Electrical
Mechanical (Windmill blades moving)
Explain the relationship of Potential and Kinetic Energy.
(Besides that they transform into each other)
Answers may vary.
Describe the Transformation of Energy of this image...
Chemical --> Electrical --> Radiant/Thermal
Name three situations that describe balanced forces
Answers will vary