Forces
Net Forces
Newton's First Law
Newton's Second Law
Newton's Third Law
100
A force that opposes motion
Friction
100
What is the Net Force on the object below?
0N
100
This word describes laziness or resistance to change in motion
Interia
100
What is the equation for Newton's second law?
The relationship between an objects force, mass, and acceleration or F=ma
100
Fill in the blank: For every action there is an _____ and opposite reaction.
Equal
200
What force keeps the Earth in orbit?
Gravity
200
What is the net force on the object below?
0N
200
Complete the sentence. An object in motion, remains in
What is motion?
200
More mass under the same force will cause ____ acceleration.
Less
200
You are hit by a car while crossing a road. Who exerts the larger force: the man or the car?
They exert the same force!
300
This is the force of a surface pushing out on an object.
Normal Force
300
Which way will the box move? The length of the arrow shows magnitude (amount) of force.
To the right
300
Complete the sentence. An object at rest, remains at
Rest
300
What is the weight of a 12 kg block?
117.6 N
300
If Earth's gravity pulls you down, which way do you pull the Earth?
Up
400
What is a change of speed or direction called? It's measured in m/s/s
Acceleration
400
Which way will the box move? The length of the arrow shows magnitude (amount) of force.
To the left
400
What will happen to a moving object when no net force acts on it?
It will keep moving
400
What would be the force of a 100 kg person accelerating at 10 m/s/s
1,000 N
400
Identify the reaction force to this force: An airplanes engines push back on the air.
The air pushes the engines (and therefore the plane) forward.
500
What is the unit for Force?
Newtons (N)
500
What is the net force on this object?
25N Right
500
Explain in terms of Newton's First Law what will happen to the microwave on top of the car when the car stops.
It will slide forwards because it has inertia and wants to keep moving.
500
What would the acceleration be of a airplane with a force of 500,000 N and a mass of of 1,000 kg
500 m/s/s
500
What was the reaction force that allowed our rocket to go up?
Water pushing up on the bottle rocket (thrust)