Work, Energy and Power Questions

An electric kettle is connected to the 230 V mains supply. The power of the kettle is 960 W. A power of 960 watts is the same as

• 960 joules per coulomb

• 960 joules per second

• 960 newtons per metre

• 960 newtons per second

When a book from a low shelf is placed on a higher shelf, the book gains

• gravitational potential energy

• mass

• weight

• work

Which unit is the same as a power of 1 watt?

• 1 joule per coulomb (1 J/C)

• 1 joule per second (1 J/s)

• 1 newton per square metre (1 N/m)

• 1 newton per kilogram (1 N/kg)

State the equation linking work done, force and distance moved.

State the equation linking power, energy transferred and time.

State the equation linking kinetic energy (KE), mass and velocity.

State the relationship between work done, force and distance moved.

State the equation linking gravitational potential energy, mass, g and height.

State the equation linking work done, force and distance.

State the relationship between momentum, mass and velocity.