Energy
Kinetic Energy
Potential and Kinetic
Calculate
More Energy!
100
The ability to do work.
energy
100
What is the the correct formula for calculating kinetic energy?
KE = ½mv² or KE =0.5mv²
100
What happens to kinetic energy if mass is increased?
kinetic energy increases
100
A ball has a mass of 2Kg, suppose it travels at 10m/s. Find the kinetic energy possessed by it.
100J
100
Which location has the highest potential energy?
B
200
The energy of motion.
kinetic energy
200
What two factors affect kinetic energy?
mass and velocity/speed
200
What happens to kinetic energy if mass is decreased?
kinetic energy decreases
200
A ball has a mass of 10Kg, suppose it travels at 100m/s. Find the kinetic energy possessed by it.
50000J
200
Which location has the lowest potential energy?
D
300
The energy an object has due to its position.
potential energy
300
Which of these affect kinetic energy the most?
- speed/velocity
- mass
- height
- distance
speed/velocity
300
What happens to kinetic energy if speed/velocity is increased?
kinetic energy increases
300
A 75-kg refrigerator is located on the 70th floor of a skyscraper (300 meters above the ground) What is the potential energy of the refrigerator?
PE= 220,500J
300
Which location has the highest kinetic energy?
D
400
The Law of _________________ of Energy states that energy cannot be created or destroyed. It can only be changed from one form to another.
Conservation
400
What happens to kinetic energy when the mass is doubled?
kinetic energy doubles
400
Which is the correct unit for kinetic energy?
Joules (J)
400
What is the equation to calculate potential energy? What is the constant for gravity?
PE=mgh
g=9.8m/s
400
Which location has the lowest kinetic energy?
B
500
The Law of Conservation of Energy means that the TOTAL energy of a system always ______________.
remains constant
stays the same
500
What happens to kinetic energy when the velocity is doubled?
kinetic energy quadruples
500
When does an object have the most potential energy?
When it is at its highest point.
500
A cart is loaded with a brick and pulled at constant speed along an inclined plane to the height of a seat-top. If the mass of the loaded cart is 3.0 kg and the height of the seat top is 0.45 meters, then what is the potential energy of the loaded cart at the height of the seat-top?
PE= 13.23J
500
A 1jg soccer ball is kicked at a speed of 5 m/s then it came to rest inside the goal. What happened to the total amount of energy of the soccer ball when it was kicked and then came to rest?
The total amount of energy stayed the same.