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Gravity & Friction
First Law
Second Law
Calculations
100
This is the difference between "weight" and "mass."
What is that weight depends on the force of gravity, but mass is the amount of matter in an object?
100
In one word, what does Newton's first law of motion describe?
What is "inertia?"
100
This is Newton's Second Law summarized in one word.
What is "acceleration"?
100
This is the force it takes to accelerate an 80 kg object at 2.0 m/s2.
What is 160 N?
200
This is one way it is possible for the gravitational force between two 50-kg objects to be less that the gravitational force between two 5-kg objects.
What is that the larger objects are farther apart?
200
What event did Newton witness that led him to come up with his first law?
What is an apple falling from a tree?
200
This is the formula for Newton's Second Law.
What is Force = Mass x Acceleration?
200
This is the acceleration of a seventy kg object pushed with a force of 140 Newtons.
What is 2.0 m/s2?
300
This is Newton's Law of Universal Gravitation.
What is that all objects in the universe are attracted to one another to a certain degree, depending on their mass and the distance between them.
300
These are balanced forces. (hint net force)
What are forces that combine and form a net force that is zero?
300
These are the base units that are combined to make one "Newton."
What is a kilogram meter / second squared?
300
This is the force exerted by gravity on an 8 kg object.
What is 78.4 Newtons?
400
This type of friction has the most resistance to motionn
What is static friction?
400
This is Newton's First Law of Motion
What is "if the net force on an object is zero, the motion of the object does not change"?
400
If you triple the size of the force in a second law problem, but keep the mass the same, this happens to the size of the acceleration.
What is that it triples?
400
A plane with 6 engines accelerates at 10 m/s2 with one engine running. This is how fast it accelerates with 3.5 engines running.
What is 35 m/s2?
500
These are the four types of friction
What are fluid friction, sliding friction, fluid and static friction?
500
This is the net force shown in the following diagram: 10N -----> <----------20N
What is 10N to the left?
500
The relationship between mass and acceleration
What is indirect
500
Mercury has 0.37 g's of gravity compared to Earth. This is the acceleration on Mercury due to gravity.
What is 3.626 m/s2?