Weight and Work Done

Weight is the force that gravity pulls an object down with.

Weight (N) = mass (kg) x gravitational field strength (N/kg)

W=mg

On Earth: gfs = 9.8N/kg (sometimes rounded to 10N/kg)

If you hold an object or lift at a constant speed you must be pushing upwards with a force that’s the same size as its weight.

Work done just means ‘energy transferred by a force’.

work done (J) = Force (N) x distance (m)

W=Fd

GPE=mgh