Vocabulary
Forces
Changes in Motion
Motion
Vocabulary P2
100
A push or a pull on an object.
What is force?
100
Which force pulls you down a playground slide?
Gravity
100
A ball is kicked and rolls along a level field until it comes to a stop. What is the force that caused the object to stop?
What is friction?
100
a situation where the forces acting on an object are not equal in magnitude
Unbalanced force
100
What is velocity?
Displacement divided by time, how fast an object moves in a specific direction.
200
This pulls objects to its center of the Earth. It keeps you grounded.
Gravity
200
The force that works against movement to slows things down.
Friction
200
What is the distance of the path and what is the displacement?
7M = Displacement
5M NE = Displacement
200
What is newtons first law?
An object will stay at rest until something forces it to move.
200
A semi-truck has to break much sooner when approaching a stop light than a sedan. Why?
The semi truck will have to stop sooner because the semi truck has more mass.
300
What is an increase in motion?
Acceleration
300
The type of force that is unequal, which results in movement?
An unbalanced force.
300
Explain why a person standing on the Moon can jump higher than a person standing on Earth.
The Moon's gravitational pull is less than Earth's.
300
You are skydiving. You are moving downward when you pull your parachute. The force of gravity is applying a downward force of 900 N. Air resistance is applying a force up of 900 N. What is the net force? Describe how the object will move.
The net force will be 0 N because the force downward is equal to the force pushing upwards. The skydiver will stay motionless!
300
How difficult it is to stop a moving object
Momentum
400
This is a force between two surfaces rubbing against each other that causes an object to slow down or stop
What is friction?
400
Ms. Starling's class and Ms. Howard's class are playing tug-of-war. After several minutes, the students notice that the rope has not moved at all. This is the cause of this standstill.
What is a balanced force?
400
A student pushes a box with a force of 15 newtons (N) to make it slide across the floor. Once the box starts moving, a frictional force of 5 N acts upon it. If the student continues to push with 15 N, what will happen to the box?
The box will move to the right due to the force pushing it right has 10 more N of force acting upon it.
400
A bowling ball sits motionless on a table and exerts a downward force on the table. The force exerted by the table must be __________ the force of the ball.
Equal to
400
An object’s resistance to a change of motion
Inertia
500
The tendency of an object to resist change in its state of motion.
What is inertia?
500
An object with greater ______________________ will take more ____________ to move or stop than an object with _______________ mass.
What is mass, energy, and less.
500
A car and a truck travel at the same speed on a road in the same direction. Both vehicles slow down with the same stopping force. Why does the truck need more distance the the car to stop?
The truck has more mass.
500
F=MA is part of this important law of motion? Once stated the correct number state the law.
Newtons second law, The acceleration of an object is related to the mass of the object and the net force acting on the object
500
Acceleration depends on which TWO factors?
Net force, Mass