Gravity
What would happen to your weight if you were on the moon?
It would decrease
F=ma is which one of Newton's Laws?
2nd Law
Before a roller coaster begins moving down a hill, which type of energy is highest?
Potential
Distance divided by time is the formula for?
Speed
If an object has a mass of 5 grams on Earth. What is its mass on Pluto?
5 grams
Air resistance causes objects that are falling to?
Slow down
What is the tendency of all objects to resist a change in motion?
Inertia
What affects kinetic energy more: mass or velocity?
Velocity
The rate at which an object changes velocity is?
Acceleration
If an object is slowing down, what type of acceleration does it have?
Negative
What are the two motions that combine to cause the Earth's orbit around the sun?
Sun's gravity and the Earth's forward motion
Force pairs are part of which of Newton's Laws?
3rd Law
What two electrical charges will attract each other?
Positive and Negative(protons and neutrons)
What is the difference between scalar and vector?
Scalars have a magnitude(number) Vectors have a magnitude and direction
A cue ball strikes an 8 ball on a pool table. If the cue ball stops and the 8 ball moves, what happened to the momentum of the cue ball?
It all transfers to the 8 ball
What are the two parts to the universal law of gravitation?
1. Gravitational force increases as mass increases.
2. Gravitational force decreases as distances increases.
Assuming the amount of force applied to an object does not change, what happens to the acceleration if you increase the mass?
It decreases
What two charges close together take more energy to push them together?
positive/positive or negative/negative
One lap around a track is 400 meters. A person runs 2 and a half times around the track. What is their distance and displacement?
Displacement-200 m
Which of Newton's Laws explains why a person not wearing a seat belt may fly through the windshield?
First Law
What is the acceleration due to gravity on Earth?
9.8 m/s2
What is the formula for finding the momentum of an object?
p=mv
What ball has the most KE?
Red Ball-4 kg going 6 m/s
Green Ball- 6 kg going 5 m/s
Yellow Ball-8 kg going 4 m/s
Purple Ball-2 kg going 8 m/s
Green Ball
A car goes from 0 to 60 km/hr in 6 seconds. What is its acceleration?
10 km/hr/s
An object falling at a constant speed