TOPIC 5 TOOLKIT

Balance the energy account.

Change inputs and inspect the transfer equation, units and result.

Angled work

Resolve the force parallel to displacement.

Force / NDistance / mAngle / °

WORK DONE50.00 J

W = Fs cos θ

Force rises uniformly from zero to a maximum.

Maximum force / NDisplacement / m

AREA = WORK18.00 J

½ × base × height

Compare gravitational potential and kinetic energy.

Mass / kgHeight / mSpeed / m s⁻¹

GPE294.30 J

mgh

KE384.00 J

½mv²

Compare useful power output with total input.

Input / WUseful / W

EFFICIENCY75.0%

useful output ÷ total input × 100%