Forces and Motion 1
Two things Gravity depends on
What is mass and distance?
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!
Is the truth about mass and weight
What is weight depends on gravity
It is an opposing force that slows down motion
What is Friction?
A change in position is called
Motion
Unit of Measurement for Energy
Joules
Forces that cause a change in motion are called..
unbalanced forces
Gravitational Force
What is one noncontact force?
Net Zero
What is a balanced force?
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
Greater the mass, the greater the gravitational pull
What is the relationship between mass and gravity?
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
Force = mass x acceleration
What is Newton's 2nd Law of Motion?
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
An object at rest stays at rest, an object in motion stays in motion unless a force is acted upon it
What is Newton's 1st Law of Motion?
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