Energy remote revision

which energy store is outlined below

• magnetic

• nuclear

• chemical

• electrostatic

which is the correct description of the transfer of energy when a speedboat is moving along a river

• the kinetic energy of the water transforms into friction and sound

• there is a change in the chemical energy transferring into internal (thermal) and sound energy

• The boat has a store of kinetic energy which is transferred into heat and sound

• The boat pushes through the water as chemical energy is transferred into kinetic energy as well as internal (thermal) and sound energy

what does the term work done mean? Tick 2 boxes

• energy is transferred

• work done is a description of power

• power = energy transferred / time

• work done = force x distance

Select the answer to complete the sentence: The more powerful a device the .......

• the more energy it transfers per second

• the longer it can work for

• the more energy it transfers

• bigger it is

What do you need to know to be able to calculate the efficiency of an object?

• how much useful energy it provides

• the amount of power it has

• the total energy supplied to it

• how long it lasts

What factors affect the size of the kinetic energy an object has?

• height

• mass

• velocity

• gravity

• energy

what factors affect the how much gravitational potential energy an object has?

• weight

• mass

• gravitational field strength

• energy

• height

Which is the correct equation for kinetic energy?

• kinetic energy = velocity x mass

• kinetic energy = 1/2 x velocity²

• kinetic energy = 1/2 x mass² x velocity

• kinetic energy = 1/2 x mass x velocity²

what is the correct equation of gravitational potential energy?

• gravitational potential energy = mass x height x gravitational field strength

• gravitational energy = 1/2 mass x height

• gravitational energy = 1/2 height x mass x gravitational field strength

• gravitational energy = 1/2 mass x gravitational field strength²

How much kinetic energy does a 1650kg car have when travelling at 11m/s?

• 18,150J

• 99,825J

• 199,650J

• 9,075J