Do the Math
Newton
Use the Force
Friction
Potpourri
100
What is the force on a 1-kg ball that is falling freely due to the pull of gravity?
9.8 N
100
Newtons 3 laws describe all of the states of motion -- rest, constant motion, and this.
What is accelerated motion?
100
When forces are this, the motion of the object does not change.
What is balanced?
100
These are the 3 types of friction.
What is rolling, sliding, and fluid?
100
Ball bearings are used to reduce this.
What is friction?
200
A woman has a mass of 50kg on the Earth, What is her weight?
490 N
200
This is measured in newtons.
What is weight?
200
This force opposes motion.
What is friction?
200
The amount of sliding friction depends on these two variables.
What is the weight of the moving object and the type of surface it is sliding on?
200
This is the formula for weight.
What is weight = mass x acceleration due to gravity?
300
A person weighs 460 N on the Earth, What is the person's mass?
46.9 kg
300
Newton's third law states for every action there is this.
What is an equal and opposite reaction?
300
Intertia is the tendency of matter to do this.
What is resist any change in motion?
300
Air is considered this type of friction.
What is fluid?
300
Along with gravity, this is why a person weighs less on the moon than on Earth.
What is because the moon's mass is less than Earth's so the moon's gravitational force is less. Weight is a measure of the force of gravity so you would weigh less on the moon.
400
A heavy object is dropped from the top of a cliff. What is its velocity at the end of 2 seconds? Just before it hits the ground after 12 seconds?
2 seconds: 19.6 m 12 seconds: 117.6 m
400
This is the formula for Newton's second law of motion.
What is Force = Mass x Acceleration
400
Objects having a small mass have little of this for other objects. Objects having a large mass have a lot of this for other objects. (2 words)
What is gravitational attraction?
400
The size of the force of gravity between two objects depends on these two variables.
What is mass of the objects and distance between them?
400
Newton's law of universal gravitation states this.
What is all objects in the universe attract each other by the force of gravity?
500
Suppose the acceleration due to gravity on a planet called Retsel is 30m/sec/sec. What is the weight of a 150 kg Retselian?
4500 N
500
http://w3.shorecrest.org/~Lisa_Peck/Physics/syllabus/mechanics/newtonlaws/Newton_webpage/2011/jaime2/freeimagebig.jpg This picture is demonstrating this law.
What is Newton's FIRST law of motion?
500
This explains why a single force cannot exist.
What is every force must have an opposite and equal force?
500
As an object falls, this becomes equal to the pull of gravity.
What is air resistance?
500
When a falling body no longer accelerates but continues to fall at constant velocity it has reached this.
What is terminal velocity?
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