lets speed it up
What is the formula for speed?
distance / time
What tool is used to measure force?
spring scale
What are the two main types of mechanical energy?
potential and kinetic
electricity is the flow of
electrons
What is the highest point of a wave
crest
If a bike goes 20 km in 2 hours, what is its speed?
10 km/hr
What is the formula for force?
f=ma
What kind of energy is stored in a stretched rubber band?
elastic potential energy
What is the formula for Ohm’s Law?
V = IR
What is the formula for wave speed?
speed = frequency x wavelength
What is the difference between velocity and speed?
velocity has a direction, speed does not
What is the weight of a 10 kg object on Earth?
98 N
A 2 kg object moving at 3 m/s has how much kinetic energy?
9 J
The symbol "Ω" represents what?
resistance
what color absorbs all light waves
black
A car travels 100 meters in 5 seconds. Then 50 meters in 2 seconds. What is the average speed?
21.4 (150 / 7)
What is a balanced force
A combination of 2 or more forces that balance out to 0 net force
Explain how energy is conserved on a roller coaster.
PE at top = KE at bottom
Identify one way that an electromagnet could be made stronger
variable
how might a green object interact with wavelengths of red light?
absorb them
A rocket accelerates from 0 to 300 m/s in 10 seconds. What is its acceleration?
30 m/s2
What is the name of the force that keeps an object moving in a circular path?
centripetal force
The form of nuclear energy that results from splitting a nucleus in half.
fission
explain how a balloon rubbed on a head becomes a source of static electricity
it gains electrons from your head
Explain what happens when light waves are refracted and why.
they bend through a new medium because of a change in speed