Gravity
Mass and force of gravity have a(n) _____ relationship.
Direct
Distance between charges and electrical force have a(n) _____ relationship.
Inverse / indirect
Why is there NO work when a person pushes a wall?
W = Fx ... force and distance
Pushing a wall = no distance = no work
An object at rest has a mass of 11 kg. What is its momentum?
0 kgm/s
(at rest = velocity is 0 m/s)
What is Ms. Leonard's first name?
Sydney
If you triple (x3) mass, what will happen to gravity?
It will also triple.
What particle moves through an electrical circuit and is transferred when there is static electricity?
Electron
W = 50 J
F = 25 N
x = ?
2 m
If you triple the speed of an object, what happens to its momentum?
It triples.
What else does Ms. Leonard teach?
Chemistry
If you triple (x3) the distance between two objects, what will happen to the gravitational force between them?
It will be 9 times smaller (x1/9)
Current = ?
Resistance = 10 ohms
Voltage = 9 volts
0.9 amps
At the top of a hill, does a rollercoaster have more...
A. Kinetic Energy
B. Spring Energy
C. Potential Energy
D. Chemical Energy
C. Potential Energy
Ball 1: Moving --> left, m = 7 kg, v = 1 m/s
Ball 2: Moving <-- right, m=4 kg, v = 1 m/s
Which direction will the balls move after an inelastic collision?
Will velocity be the same, bigger, or smaller?
Left with a smaller velocity.
What is on Ms. Leonard's lanyard?
The elements from the periodic table.
m1 = 2.9 kg
m2 = 70 kg
r = 5 m
F = ?
F = 5.42 x 10^-10 N
Series Circuit
R1 = 30 ohms
R2 = 15 ohms
R3 = 18 ohms
What is total resistance?
63 ohms
mass = 2.4 kg
Kinetic Energy = 14 J
velocity = ?
3.4 m/s
Car Mass = 115 kg
Car Velocity = 2 m/s
Person Mass = 90 kg
Person Velocity = 2.7 m/s
Which has more momentum?
Person (243 kgm/s > 230kgm/s)
How many years has Ms. Leonard's been at McHenry?
3 years
m1 = 5.4x10^7 kg
m2 = 1.2x10^3 kg
r = 4.6x10^20 m
F = ?
F = 2.04x10^-41 N
Parallel Circuit
R1 = 30 ohms
R2 = 15 ohms
R3 = 18 ohms
What is the total resistance?
6.43 ohms
A person with a mass of 75 kg has 250 J of potential energy at the top of a ladder.
If the person falls to the ground, how fast were they going right before they hit the ground?
2.58 m/s
Change in momentum during a collision= 17 kgm/s
Time of impact = 0.5 seconds
What is the force applied during the collision?
34 N
A. Where did Ms. Leonard go to college?
B. What activity did she do there?
A. ISU
B .Circus