Definitions
Formulas
Random
Units
Word Problems
100
What is weight?
A force, acceleration or the same as mass?
Force
100
What is the formula for momentum?
p = mv
100
Aristotle believed that if you dropped a heavier object and a lighter object at the same time they would what?
(hint: fall faster, fall at same speed, etc.)
The heavier object would fall faster.
100
The unit for mass is what?
Kg
100
You kick a 2 kg soccer ball and it accelerates at a rate of 3 m/s2. How much force did your foot apply to the ball?
6 N
200
What is mass?
The amount of matter an object has
200
What is the formula for force?
F = ma
200
Galileo proved Aristotle wrong and showed that if you dropped a heavier object and a lighter object at the same time they would actually do what?
They would actually fall at the same speed.
200
The unit for Force is what?
N or kg*m/s^2
200
You drop an anvil from the Empire State Building, because everyone else does. The anvil has a mass of 20 kg and landed with a force of 196 N. What was the acceleration of the anvil due to gravity?
a = F/m = ?
9.8 m/s^2
300
Newton's First Law of Motion is often referred to as what?
The Law of Inertia
300
What is the number and unit for gravity on Earth?
9.8 m/s^2
300
Newton has how many laws?
3
300
The unit for gravity is what?
m/s^2
300
You jump to avoid being hit by an anvil some idiot dropped off of the Empire State Building. You accelerate at 2 m/s and by applying a force of 140 N with your legs. What is your mass?
m = F/a = ?
70 kg
400
Momentum can be defined as what?
A mass in motion
400
What is the formula for weight?
w = mg
400
What is Newton's 2nd Law of Motion?
The force applied to an object is directly proportional to the mass of the object and its acceleration.
400
The unit for acceleration is what?
m/s^2
400
A 6000 kg freight car is heading east at 4 m/s. It collides with an 8000 kg freight car that is stationary. After they collide, they couple. What is their velocity after the collision?
1.71 m/s east
500
Conservation of Momentum is defined as what?
Momentum of a system is constant if there are no external forces acting on the system.
500
(m1V1 + m2V2) = (m1V1 + m2V2) is referred to as what?
Momentum before = Momentum after
500
What is Newton's 3rd Law of Motion?
For every action force, there is an opposite and equal reaction force.
500
What is the unit for momentum?
Kg*m/s
500
A 6000 kg railroad car moving at 5 m/s collides into a stationary car with a mass of 4000 kg. If they couple together after the collision,what will be their combined velocity immediately after impact?
3 m/s