Unit 6 Motion
What will have more inertia, a bee or a human?
human
Will an object move if its forces are balanced?
No
3 things PE depends on are....
hight, gravity, mass
Waves carry....
energy
Red and blue shift are examples of the Doppler effect, which shows a change in wave........
frequency
What is the equation for speed?
S= distance over time
The upwards force acting on a book on a table
normal force
True or false: You can have high PE and high KE at the same point
False: you either have high KE and low PE, High PE and low KE, or balanced/medium amounts of KE and PE
What do waves do when they are reflected?
they bounce off a surface
True or False: Stars with more mass live longer
false
Calculate the amount of work that was done by the sledgehammer when the sledgehammer moved 2 m and a force of 10 N was used. (W = Fd)
20J
The force that resists motion
friction
The 3 types of mechanical energy are....
Gravitational Potential, Elastic Potential, Kinetic
A medium
What are the 3 types of galaxies?
Irregular, elliptical, and spiral
A sprinter runs 30.0 meters west in 10.0 seconds. Calculate the sprinter’s velocity.
(v = d/t)
3 m/s west
What is the difference between a vector and scalar?
vectors have magnitude and direction
Describe the kinetic and potential energy of a swing at its highest point
high PE low KE
Sound travels through what state of matter the fastest?
Solid
The absolute brightness of a star depends on
size and temperature
What is Newtons first law of motion also known as
law of inertia
If you have 1900J of TME(total mechanical energy) and 200J of KE, how much PE do you have?
1700 J
What is the difference between displacement and distance
displacement is from start to finish, distance is everything traveled
List visible light waves from the shortest to longest wavelength
violet, indigo, blue, green, yellow, orange, red
One defining characteristic of our galaxy is....
The arms of the spiral