Potential Energy
Kinetic Energy
Energy Efficiency
Random
100
What is the potential energy of a 0.5 kg ball that is being held 2 m in the air?
9.8 J
100
What is the kinetic energy of a tennis ball that is 0.1 kg and is moving at 8 m/s?
3.2 J
100
A toaster has 200 J of energy inputted and uses 130 J of useful heat energy. What is the efficiency?
65%
100
What flag is this?
Scotland
200
A crane is holding a 13 kg glass window 82 m in the air to replace a window on the Bell Tower. How much energy does this new window have.
Answer in kJ
10.4 kJ
200
A player in rugby is going in for a tackle. They weigh 110 kg and are running at the opposing player at 2.5 m/s. How much energy is in his tackle?
344 J
200
A light bulb takes in 110 J of energy and produces 90 J of heat and 20 J of light energy. How efficient is the light?
18%
200
Which famous scientist developed the theory of relativity? (full name)
Albert Einstein
300
What is the potential energy of a 700 g tyre sitting at the top of a 15 m tall hill?
102.9 J
300
A car that has a mass of 900 kg is travelling at 13.8 m/s. How much energy does it have?
Answer in kJ.
86.8 kJ
300
A wind turbine has 60 kJ of kinetic energy pushed through it. If it produces 55 kJ of electrical energy, 4 kJ of heat energy and 1 kJ of sound energy. What is the efficiency of the turbine?
92%
300
Which artist painted the roof of the Sistine Chapel in Rome?
Michaelangelo
400
A diver weighs 85000 g, they are 0.0075 km in the air. What is their potential energy?
Answer in kJ
6.25 kJ
400
A feather weighs 1 g, it is falling at 278 m/s. What is the energy of this feather just before it hits the ground?
38.6 J
400
If a television takes 1.1 kJ of energy in, and it converts that into 400 J of light, 250 J of sound and 450 J of heat energy. How efficient is it?
59%
400
What is the brightest star in the southern hemisphere?
Sirius
500
A 90 kg person is in a hot air balloon 3 km above the ground, the person goes to take a photo using a 321 g phone. How much gravitational energy is in this person's phone?
9.43 kJ
500
There is a rocket taking off and a bug gets stuck to the rocket. The bug weighs 5 g, it falls off as the rocket reaches 2639 m/s.
What is the energy of the fly as it leaves the rocket? Answer in MJ.
17.4 MJ
500
A gas heater releases 450 J of heat, 200 J of light and 50 J of sound. How efficient is the heater?
64%
500
How many keys does a grand piano have?
88