Motion
A change in speed, direction or both
What is acceleration?
The work done on a soccer ball that has been kicked is an example of this type energy.
What is kinetic?
Includes both liquids and gasses
What are fluids?
work divided by time
What is power?
The two types of stored energy
Gravitational PE
Elastic PE
F= ma
What is Newton’s 2nd law?
Force that opposes the motion of objects as they move past one another
What is friction?
Pressure within a fluid is distributed equally throughout the fluid
What is Pascal's Principle?
force x distance
What is work?
Differentiate between potential & kinetic energy. Give an example of each
Potential - stored energy; energy of position
Kinetic - energy of motion
Carter runs 30ft north, 20 ft west, and 30 ft south. What is the distance and displacement for Carter?
Distance = 80ft
displacement = 20ft W
The energy stored in wood used for a fire
What is chemical?
Buoyant force is equal to the weight of the fluid displaced
What is Archimedes's principle?
A crate is being lifted into a truck. If it is moved with a 2470N force and 3650J of work are done, then how far is the crate being lifted?
Distance = 1.5m
A car is traveling with a velocity of 45m/s and has a mass of 1210kg. The car has ________ energy. Calculate it.
KE = 1,225,125 J
Resistance to change the motion of an object
What is inertia?
Energy of an object due to its position
What is potential?
The faster a fluid moves the lower the pressure with in it
What is Bernoulli's principle?
What are the 6 kinds of simple machines, and an example of each?
Lever, pulley, wheel and axle, wedge, inclined plane, and screw
The potential energy of a 40kg cannonball is 14,200J. How high was the cannon ball to have this much PE?
h = 36.2m
Rachel walks 3km north, and then turns east and walks 6km. What is her distance and displacement?
Distance = 9km
d= 6.7km NE
For every action there is an equal and opposite reaction
What is Newton’s 3rd law?
If the area of a box touching the ground is 1.5 square meters, and its' weight is 2,700 Newtons. What pressure does the box exert on the ground?
What is 1,800 Pa?
What is 1,800 N/ sq. m
Your family is moving to a new apartment. While lifting a box of 1.5m straight up to put it on a truck, you exert an upward force of 200N for 1.0s. How much power is required to do this?
P= 300W
What are the 6 kinds of renewable energy sources. Brief description
hydroelectric
solar
geothermal
wind
biomass
nuclear fusion