Gravity Maths
Newton's Three Laws
Newton's Three Laws 2
MISC.
Using Newton's Laws
100
What is the gravity formula?
Fg = mg
Force of gravity = mass x gravitational strength
100
What is Newton's First Law of Motion?
An object moves at a constant velocity unless an unbalanced force acts on it.
100
A bug flies into a car's windshield. What kind of force will the the bug and windshield feel?
Equal forces
100
Yes?
No!
100
If a car moving at 50km/hr crashes into a wall and comes to a complete stop, how fast are the humans inside traveling?
50km/hr
Law of conservation of momentum
200
What are the units for the gravitational formula?
Fg = N
m = kg
g = N/kg
200
What is Inertia?
The tendency of an object to resist any change in its motion
200
What is the most common formula for Newton's second law of motion?
Fnet = m x a
200
What does it mean if someone has Sir in their name? (Sir Isaac Newton)
They were knighted by the british royal family.
200
What is the scientific reason you get injured in a car crash?
You are still moving at whatever speed the car was going. When a human comes to a sudden stop they get injured.
300
A squirrel has a mass of 0.5kg. What is its weight?
(0.5kg)(9.8N/kg) = 4.9N
300
What is Newton's Second Law of Motion?
An objects acceleration is the same direction as the net force on the object and is equal to the net force exerted on it divided by its mass
300
What are the correct labels for the newton's second law of motion equation?
Fnet = N + direction
m= kg
A = m/s2+ direction
300
Describe the forces in this scenario:
Unbalanced
300
What do seat belts and airbags try to do for you? (scientific reason)
They slow down your velocity so you don't come to a sudden stop
400
A boy weighs 400N on Earth. What is his mass?
40.82kg
400
What is Newton's Third Law of Motion?
When an object exerts a force on a second object, the second object exerts a force on the first that is equal in strength and opposite in direction
400
What is the net force on a dragster car with a mass of 900kg it is acceleration is 32.0m/s2 west?
28,800 N West
400
Describe the forces in this scenario:
Balanced
400
If you drop a bowling ball and a feather in a vacuum, which one will hit the ground first?
They will hit at the same time.
500
An astronaut has a mass of 100kg and has a weight of 370N on Mars. What is the gravitational strength of Mars?
3.7N/kg
500
Why is it improper to say "For every action there is an equal and opposite reaction."?
That statement implies one force is causing the other but that is not the case.
One force is not causing the second force, they occur at the same time.
Forces are not always perfectly equal. One force may be stronger than another.
500
You push a wagon that has a mass of 12kg. If the net force on the wagon is 6N south, what is the wagon's acceleration?
0.5m/s2 South
500
What is an example of a centripetal force?
Earth Revolving around the sun, carnival ride
500
What do parachutes do for you? (scientific explanation)
They lower your terminal velocity to a safe velocity