Unit conversions

Summary

Physics cares a lot about units if you plug km/h into a formula that expects m/s your answer will be wrong even if your algebra is perfect so before using a formula you convert units so they cancel like fractions that way your final answer ends in the correct unit

Think of it like currency conversion, you cannot add dollars to yen without converting

• Always convert before Formulas

• Units can like fractions

• Use conversion ratios

• Goal unwanted unit

Common physics units

Distance – m

Time – s

Velocity – m/s

Acceleration – m/s²

Force – N