Work Done Flashcards
Define work done.
Work done is the energy transferred by a force moving an object.
What is the formula for calculating work done?
Work done = force x distance moved
What are the units of work done?
Joules (J)
What are the units of force?
Newtons (N)
What are the units of distance in the work done equation?
Metres (m)
Calculate the work done by lifting a 200 N rock a distance of 0.25 m.
Work done = 200 N x 0.25 m = 50 J
How much work is done if a rocket transfers 2,500,000,000,000 J of energy?
2,500,000,000,000 J
How much energy is transferred when a bodybuilder lifts a 10 N weight a distance of 2.5 m?
Work done = 10 N x 2.5 m = 25 J
A crane lifts a 400 N crate 15 m. How much work is done?
Work done = 400 N x 15 m = 6000 J
How far has a shopkeeper lifted a box if she uses a force of 50 N and does 75 J of work?
Distance = Work done / Force = 75 J / 50 N = 1.5 m
