The property that resists changes to a state of motion.
What is Inertia
100
Forces cause changes in motion
What is Newtons first law
100
The speed at any instant
What is instantaneous speed
100
The relationship between two forces in an interaction
What is Newtons 3rd law
100
90 mph
If a car is going 45 mph and another car is going 45 mph and they crash, how much force is applied between them both
200
The measurement of mass
What is Kilograms
200
He assumed that Earth and the other planets move around the sun
Copernicus state about Earth's motion
200
Total distance divided by time
What is average speed
200
action force and reaction force
Name the two forces
200
Both hit the ground at the same time
In a vacuum room would a feather or bowling ball hit the ground first Hint: trick question
300
The force of gravity on an object
What is Weight
300
friction is present when.
what is a force needed to keep an object moving
300
Support force
what is If weight pushes down, what is pushing up? Hint: often called normal force
300
The second object exerts an equal and opposite force on the first object
What happens when an object exerts a force on another object
300
Air resistance increases the acceleration
Does air resistance increase or decrease acceleration of falling objects
400
The force that acts between materials.
What is Friction
400
Tile, more smooth
Would a hockey puck have less friction on cement or tile
400
When an object is at rest
What is static equilibrium
400
30 lbs
If you hit a wall with 30lbs of force how much force is acting on you
400
30-5/10 = 2.5
Calculate the acceleration of a bus that goes from 5 km/h to a speed of 30 km/h in 10 seconds
500
The combination of all forces on an object.
What is net force
500
natural and violent motion
According to Aristotle, what were the two types of motion
500
10 lbs
You pull horizontally on an object with a force of 5lbs. A freind assists you, and pulls in the same direction with 5lbs. What's the net force
500
True
True or False? If a horse in the horse-cart system pushes the ground owith a greater force than it pulls on the cart, there is a net force on the horse, and the horse-cart system acclerates.
500
Would a skateboard glide faster on concreate with ridges, nubs,or a smooth flat surface. Why?
What is Smooth Flat surface because there is less friction on a smooth flat surface.