Kinetic Energy Basics
What is the formula for calculating kinetic energy?
KE = 1/2 x MASS x SPEED2
Calculate the kinetic energy of a 10 kg object moving at 2 m/s.
20J
How does doubling the mass of an object affect its kinetic energy?
Kinetic Energy Doubles
How is kinetic energy important for cars?
It affects how fast it goes and stops.
Calculate the kinetic energy of a 12 kg object moving at 3 m/s.
54 J
What does the "KE" in the formula stand for?
Kinetic Energy
If a car has a mass of 1,200 kg and is moving at 10 m/s, what is its kinetic energy?
60,000 J
If speed is doubled, how does kinetic energy change?
Kinetic Energy increases by 4 times
Describe how kinetic energy is involved in a soccer game?
Kicking the ball gives it kinetic energy, allowing it to move.
A 100 kg object is traveling at 5 m/s. What is its kinetic energy?
1,250 J
What units are used to measure kinetic energy?
Joule
What is the kinetic energy of an object with a mass of 5 kg traveling at 3 m/s?
22.5J
What happens to kinetic energy if mass is cut in half and speed remains the same?
Kinetic energy is also cut in half.
How does a roller coaster demonstrate kinetic energy?
It converts potential energy at the top into kinetic energy as it goes down (descends).
If a bicycle weighs 15 kg and is moving at 10 m/s, what is its kinetic energy?
750 J
What does kinetic energy depend on?
Mass and Speed
Calculate the kinetic energy of a 15 kg object moving at 8 m/s.
480 J
Explain how mass and speed relate to kinetic energy.
KE increases with greater mass and speed.
Why do engineers need to consider kinetic energy in building bridges?
To ensure they can withstand forces from moving vehicles.
Calculate the kinetic energy of a 4 kg object moving at 7 m/s.
What type of energy is kinetic energy?
Energy of motion
A 25 kg object is traveling at 6 m/s. What is its kinetic energy?
450 J
A bicycle has a mass of 20 kg and is traveling at 6 m/s. What is its kinetic energy compared to a 10 kg bicycle moving at 12 m/s?
20 kg bike = 360 J
10 kg bike = 720 J
The 10 kg bike has more kinetic energy.
How can kinetic energy be converted into other forms of energy in a wind turbine (energy transformation)
Kinetic energy from wind turns the blades (to mechanical energy), then to electrical energy.
A vehicle with a mass of 800 kg moves at 25 m/s. What is its kinetic energy?
250,000 J