Mass Vs Weight Mass Amount of stuff you
- Slides: 8
Mass Vs Weight
Mass: • Amount of stuff you have. Protons, Neutrons, electrons • Measured in Kg, g, Slugs • A measure of Inertia • Not Zero in space Weight: • Force of gravity acting on an object • Measured in N, dynes, pounds • Zero in the absence of a gravitational field. • F = ma (a = g = 9. 8 ms-2 on earth) • weight = mg, g = 9. 8 N/kg
Whiteboards: Mass and weight 1 | 2 | 3 | 4 TOC
What is the weight of a 26. 2 gram European Swallow? m = 26. 2 g =. 0262 kg F = ma, F = (. 0262 kg)(9. 8 N/kg) = 0. 25676 N 0. 257 N W
What is the mass of an object that weighs 582 N on earth? F = ma, m = F/a = (582 N)/(9. 80 N/kg) = 59. 4 kg W
A 62. 0 kg person weighs 101 N on the moon. What is the moon’s “g”? F = ma a = F/m = (101 N)/(62. 0 kg) = 1. 63 N/kg W
A 23. 1 N airtrack glider experiences a net force of 12. 7 N sideways on it. What is its acceleration? (two stepper) weight = 23. 1 N 12. 7 N F = ma mass of glider: m = F/a = (23. 1 N)/(9. 80 N/kg) = 2. 357 kg acceleration of glider: F = ma, a = F/m = (12. 7 N)/(2. 357 kg) = 5. 39 ms-2 5. 39 m/s/s W
