Speed
What is the speed of an object rolling at a time of 5 s and at a distance of 400m?
80 m/s
If an object is moving at a constant speed and its mass is doubled, how would its KE change?
It would double
What is Kinetic Energy?
Motion Energy.
What has a greater amount of KE. Explain why.
Object 1: Mass= 13kg Speed=12m/s
Object 2: Mass= 100kg Speed= 12m/s
Object 2: Mass= 100kg Speed = 12m/s.
Because object 2 has a greater mass.
At the very top of the 1st drop of a roller coaster, which is greater, KE or PE?
PE
What is the speed of an object at 23.65s and 400.45m?
16.93 m/s.
The greater the mass, the _____ the kinetic energy is
greater.
What is Speed?
The rate of change of position (distance) over time.
What has less kinetic energy, an object with the mass of 34kg and a speed 2m/s or an object with a speed of 10m/s and a mass of 34 kg?
What is 34kg and 2 m/s.
What four things need to be included on a graph?
Title, x-axis label, y-axis label, scale
What is the formula to find speed?
distance over time. (d/t)
If speed increases so does
Kinetic Energy.
What is Potential Energy?
Stored Energy
What has a greater amount of kinetic energy? Explain why.
Object 1: 200 m/s and 12kg
Object 2: 400 m/s and 12 kg
What is Object 2: 400 m/s and 12kg.
Describe which is greater between KE and PE when a rock is rolled down a steep hill. (During each part of the event)
At the top PE is greater and KE is less.
As it goes down KE is greater and PE is less.
When it reaches the bottom PE is greater and KE is less.
What is another word for speed?
Velocity.
In order to find kinetic energy I need to know
the mass and the velocity
What is Kinetic Energy measured in?
What is joules.
What has the least amount of KE?
Object 1: 12 kg and 30 m/s
Object 2: 12 kg and 1 m/s
Object 2: 12 kg and 1 m/s
If you graphed KE vs mass of an object, what shape of graph would you expect to see?
A line (it's a linear relationship)
What does m/s stand for?
What does km/ hr stand for?
meters/ second
kilometers/ hour
If an object's speed (velocity) doubles, the kinetic energy will do this
Quadruple
What does the Law of Conservation of Energy state?
Energy cannot be created or destroyed, but can change form.
What has the greater amount of Potential Energy?
Object 1: Mass of 20kg and speed of 10 m/s
Object 2: Mass of 40 kg and speed of 20 m/s
Object 1: Mass of 20kg and speed of 10 m/s
If you graphed KE vs speed (velocity) what shape of your graph would you expect to see?
Curved (it's exponential)