Question

A boy lifts a mass of 5kg to a height of 125cm.If the force of gravity on a mass of 1kg is 10N,find the work done by the body.
useless answers will be reported.useful answers will be marked as brainliest.​

Answer 1

Given that,

Force of Gravity of a mass of 1 kg = 10 N

⟹ g = 10 m/s²

Returning to the actual question,

Mass of the body = 5 kg

Height displaced = 1.25 m

since, W = F × s ⟹ W = w × s

∴ W = (5 kg)(10 m/s²) × 1.25 m

[Do not forget that Weight is also a force]

⟹ W = (50)(1.25) Nm

⟹ W = 62.5 Nm

⟹ W = 62.5 J