Name that term
What is the energy of motion?
Kinetic energy
F=
m x a
If a ramp made of candy canes is 3 meters long and used to load an elf truck 1 meter from the ground, what is the IMA of the ramp?
IMA=input distance/output distance
IMA=3/1
IMA=3
What is the SI unit of power?
a.joule
b.newton
c.N x m
d. watt
d. watt
Inertia
The tendency of an object to resist change in it's velocity.
Work can be defined as a transfer of what?
Work can be defined as the transfer of ENERGY when a force (in the direction of motion) moves an object a distance.
V=
d/t
If Miles moves a load of bricks a distance of 10 m across a parking lot and pushes the cart with a constant force of 220N, what amount of work does he do?
W=f x d
W=10m x 220N
W=2200 J
You push on a hippopotamus standing in your driveway and are unable to move it. (Good try) What force opposes your push?
a. static friction
b.kinetic energy
c.rolling friction
d.air resistance
a. static friction
Fission
When you split an atom into two or more pieces
The force that is 100 times stronger than electromagnetic force
The Strong force
W (work)=
f x d
What is the kinetic energy of a 74,000 g man wearing a snowsuit and flip-flops traveling in a black Fiat at a speed of 52 m/s?
First convert grams into kg.
74,000/1000g/kg=74 kg
KE= 1/2 x m x v^2
KE=1/2 x 74 x (52)^2=100,048 J
What kind of energy is stored in gasoline in a shampoo bottle labeled "Hazardous"?
a. chemical
b. nuclear
c. elastic potential
d. thermal
a. chemical energy
Law of Conservation of Energy
Energy cannot be created or destroyed, it can only be converted from one form to another or transferred from one object to another.
The amount work done per second
Power
IMA=
input distance/output distance
a better and easier way to measure the mechanical advantaged of a machine
You are having an In-n-Out burger when you witness two accidents happen in a street. The first accident happened when a Tesla (driven by a cat) driving 40 mph north hits a Camry driving 28 mph north. The second accident happened at the same time: Your Grandma's Cadillac (don't worry, she's fine) driving 10 mph east hit a Ride on Lawn Mower going 8 miles west. Emotions aside, which car accident's relative velocity is greater, thus needing attention first?
Tesla v. Camry
v1-v2
40-28=12 mph
v1+v2
10 + 8= 18mph.....go check on Grams!
In which of the following is no work done?
a.climbing rainbow candy stairs
b. lifting a unicorn shaped rock
c. pushing your mom's Target shopping cart
d. work is done in all options
d. work is done in all circumstances because the force and motion are in the same direction.
Mechanical energy
the sum of an object's potential energy and kinetic energy
General Theory of Relativity
Kinetic Energy=
1/2 x m x v^2
Your baby sister is holding your new iPhone next to the Grand Canyon and can't get it to play Baby Shark. She decides your phone is broken and to do you the favor of tossing it. 0.62 minutes later, you hear a faint crunch and realize your phone is now at the bottom of the canyon. How far did your baby sister throw your phone? (She is very, very cute and kind, so you forgive her immediately!)
t= 0.62 min x 60 seconds/1 min.
t= .62 x 60=37.2 s
a=9.8m/s^2
d=1/2 x a x t^2
d=.5 x 9.8m/s x (37.2 s)^2=6,780.816 m
In which of the following is a force acting on a zebra doing no work?
a. a machine is used to move a zebra to the top bunk
b. the force is not in the direction of the zebra's movement
c. the force is greater than the force of the friction of the Zebra's hooves
d. the Zebra accelerates
b. the force is not in the same direction as the zebra's movement.
Acceleration due to gravity
9.8 m/s^2