Units
Kinematics
Newton's Laws
Collisions
Data
100
Convert 2 kilometers to meters
2 km = 2000 m
100
What acceleration do we use for objects falling near the surface of the Earth?
g = 9.8 m/s2
100
If no forces are applied, what can we say about the velocity of an object?
Stays constant
100
How do you find the momentum of an object?
p = mv
100
What units are used for the y-axis of this plot?
m/s2
200
Units of m/s2 measure what quantity?
Acceleration
200
A hockey puck is sliding at 10 m/s. How far does it travel in 3 s?
30 m
200
Newton's 2nd Law relates force to acceleration. Give the equation it states.
F = ma
200
How is change in momentum (impulse) related to force?
F*t = J = pf - pi
200
Does this plot show correlation between the two parameters? If so, positive or negative?
Yes, positive.
300
What factor does the prefix milli- indicate?
1/1000 = 0.001
300
A ball is dropped from rest at the top of a 20 m building. How long does it take to reach the ground?
1.43 s
300
A 5 kg textbook is resting on a table. Name the forces acting on it and their values.
Gravitational force of 49 N down, and normal force of 49 N up.
300
One pool ball moving North at 4 m/s strikes another at rest. The first ball comes to a stop; what is the velocity of the second ball?
4 m/s North
300
Which of these datasets shows a greater velocity?
Dataset 2
400
What type of quantity results if we multiply an acceleration by a time?
Velocity
400
A car accelerates from 20 m/s to 30 m/s over a distance of 50 m. What is its acceleration?
5 m/s2
400
A car with mass 1500 kg skids on a level ice patch with a coefficient of friction equal to 0.05. What is the friction force it experiences?
0.05*9.8*1500 = 735 N
400
A bicycle has a momentum of 24 kg m/s. What momentum would the bicycle have if it had three times the mass and was moving with one-half the speed?
36 kg m/s
400
What does it mean for two quantities to be correlated?
Given changes in one quantity, we can predict changes in the other.
500
Newtons (N) are a combination of several more basic units. What are they?
kg m/s2
500
An arrow is fired with a speed of 20 m/s at an angle of 30º above the horizontal. How far away does it land?
35 m
500
A small car and a large truck collide and come to a stop. Which is greater, the force of the car on the truck, or the force of the truck on the car?
They are equal (Newton's 3rd Law)
500
A 70 kg astronaut throws a 2 kg wrench at 20 m/s. How fast will the astronaut be going after letting go?
0.57 m/s
500
If A causes B, does this mean they will be correlated?
Yes, but the opposite is not necessarily true