Laws of Motion
Scientific Notation
Law of Gravity
Free-body Diagrams
Random
100
What is Newton's Second Law of Motion?
F=ma
100
How do you represent the number 365,000,000 in scientific notation?
3.65 x 108
100
What does the letter G stand for in Newton's Law of Gravity?
Gravitational constant (also acceptable: 6.67 x 10-11)
100
What do the arrows in a free-body diagram represent?
Forces
100
What units are used to measure force?
Newtons (N)
200
A student tosses a 3-kg book to a friend so that the book accelerates at 3 m/s2. With what force did the student throw the book?
9 N
200
How do you represent the number 3.1 x 10-7 in standard form?
0.00000031
200
r2 is mathematically equivalent to ...
r x r (also acceptable: distance squared)
200
In a free-body diagram, what do the direction and length of the arrows represent?
The direction and strength of the forces.
200
How do you represent the number 5.43 x 105 in standard form?
543,000
300
A person pushes a 45-kg box across the floor with 20 N of force. How much does the box push on the person?
20 N
300
(3 x 105)(2 x 109)
6 x 1014
300
Two stars are 2.7 x 1012 m apart. The first star has a mass of 5.1 x 1032 kg, and the second has a mass of 6.2 x 1031 kg. If you wanted to calculate the force of gravity between the two, which number would you use for r?
2.7 x 1012 m
300
What direction will the box move?
Right
300
What is Mr. Clarke's favorite way to get to school?
Riding his bike
400
Three people push a stuck car with 1800 N of force. The car has a mass of 3600 kg. What is the resulting acceleration of the car?
0.5 m/s2
400
2 x 102
400
A student is trying to calculate the force of gravity between the Earth (m = 5.97 x 1024 kg) and the Sun (m = 1.99 x 1030 kg), which are 1.47 x 1011 m apart. Identify one of the student's two mistakes (+50 if you can get both).
Distance should be squared.
Forgot to multiply the numerator by G.
400
Will the car move?
Yes
400
What is the net force on the car?
110 N
500
A student has a mass of 50 kg. What is the student's force of gravity on the Earth? (i.e. how much does the student's gravity pull Earth toward her?)
Think carefully--you can solve this using only Newton's 2nd and 3rd laws.
490 N
500
1 x 1020
500
Our galaxy (the Milky Way) has a mass of 6 x 1041 kg. The Andromeda Galaxy, the nearest major galaxy to the Milky Way, has a mass of 1.8 x 1042 kg. The two galaxies are 2.4 x 1022 m apart. What is the force of gravity between the two galaxies?
1.25 x 1029 N
500
If the car is moving forward, what is the smallest that the applied force could be? (pick a whole number)
151 N
500
What year did Minnesota become a state?
1858