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
The fixed point on a lever is called the ___________
fulcrum
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
Energy cannot be created or destroyed but it can be _____________ or _________________
transformed or transferred
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
Speed is ________________ and velocity is ___________________
Speed is distance over time and velocity is speed with direction.
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)
What is the difference between potential and kinetic energy?
potential energy is stored energy and kinetic energy is the energy of motion
Joey runs 600 m to school in 5 minutes. What was his average speed?
a. 60 m/s b. 2 m/s c. 1 m/s/s d. 1 m/s
b. 2 m/s
What are 2 examples of an unbalanced force?
a. A chair
b. Dropping a feather c. Weight
d. Sitting
e. Swinging on a swing
f. Time
b. Dropping a feather and e. swinging on a swing are examples of unbalanced forces