Work It Out
The formula for calculating work.
What is force times distance?
The unit used to measure power.
What is a watt?
The measure of how hot or cold something is.
What is temperature?
Heat transfer through direct contact.
What is conduction?
A person lifting a backpack is an example of what kind of energy transfer?
What is work?
If a person pushes a box with 10 N of force for 3 meters, how much work is done?
What is 30 joules?
A person does 100 J of work in 5 seconds. What is their power output?
What is 20 watts?
The unit used to measure temperature in science.
What is degrees Celsius (or Kelvin)?
Heat transfer through liquids and gases.
What is convection?
This household appliance uses electrical energy to produce thermal energy.
What is a toaster (or oven)?
True or False: Holding a heavy box still is doing work.
What is false?
True or False: Two people doing the same work can have different power outputs.
What is true?
The total kinetic energy of particles in a substance.
What is thermal energy?
Heat transfer through electromagnetic waves.
What is radiation?
A faster runner has more power because they do the same amount of work in ___ time.
What is less time?
A crane lifts a 200 N load 15 meters high. How much work is done?
What is 3,000 joules?
A motor does 4,000 J of work in 8 seconds. What is the power of the motor?
What is 500 watts?
Heat always flows from this temperature to that temperature.
What is hot to cold?
This is why the upstairs of a house is usually warmer than the downstairs.
What is convection?
Why does metal feel colder than wood at the same temperature?
What is metal conducts heat away faster?
A student does 1,500 J of work in pushing a cart 5 meters. How much force was used?
What is 300 newtons?
A machine has a power output of 250 W and works for 12 seconds. How much work is done?
What is 3,000 joules?
The amount of energy needed to raise the temperature of 1 gram of a substance by 1°C.
What is specific heat?
A metal spoon in hot soup becomes warm due to this type of heat transfer.
What is conduction?
A car engine converts chemical energy into these two forms of energy.
What are thermal and mechanical energy?