a change in an object's position relative to a reference point
motion
write the equation used to calculate speed
s = d/t
a cat runs 20 m away from home, but eventually returns for food. what is the cat's distance?
40 m
what unit is used to represent work?
Joules (J)
what is potential energy?
stored energy
transfer of energy when a force is applied over a distance
work
write the equation used to find acceleration
a = vf - vi / t
a cat runs 20 m away from home, but eventually returns for food. what is the cat's displacement?
0 m
what unit is used to represent force?
Newtons (N)
what is kinetic energy?
energy due to motion
the ability to cause change or do work
energy
what is the difference between speed and velocity?
velocity has direction, speed doesn't
speed is scalar
velocity is a vector
if Preston rides his bike 45 km and that takes him 3 hours, what is Preston's speed? make sure to include units in your answer
15 km/hr
write the formula used to calculate work
w = f x d
imagine a ball rolls down a hill. does it have more kinetic energy or potential energy as it rolls down?
kinetic energy because it is moving
states that energy cannot be created or destroyed
law of conservation of energy
what type of speed (average or instantaneous) would a speedometer in a car show?
instantaneous
Angelina travels at a speed of 6 m/s for 12 s. how far did she travel? include units in your answer
72 m
600 J
object A is 30 m from the ground. object B is 45 m from the ground. which object has a greater amount of potential energy?
object B
what do scalar and vector mean?
scalar - numerical
vector - number and a direciton
what are 3 ways acceleration can change?
speeding up
slowing down
changing direction
over a time of 300 s, Cody runs at a speed of 10 m/s. later, he speeds up to 20 m/s. what is his acceleration? include units in your answer
0.03 m/s2
what distance was an object moved by a force of 50 N if the work done was 100 J?
2 m
what are the 3 types of PE we watched videos about in class while taking our Energy Notes?
gravitational
chemical
elastic