Steel has a density of 8030kg/m^3. Show that a steel ball with a diameter of 5cm weighs approximately 5N
Using Weight = mass*gravitational strength
Using: Mass = density * volume
Using Volume = (4/3)pir3
Radius = 2.5cm = 0.025m
Volume = (4/3)pi0.0253 = 0.00006544 m3 (to 4 siginificant figures)
Mass = 8030 * 0.00006544 = 0.5256 kg (to 4 significant figures)
Weight = 0.5256 * 9.81 = 5.155 N (to 4 signigicant figures)
5.155 is approximately 5, therefore weight of the steel ball is approximately 5N
SH
Related Physics A Level answers
All answers ▸A man weighing 600N steps on a scale that contains a spring. The spring is compressed 1cm under their weight. Find the force constant of the spring and total work done on its compression.
What is the photoelectric effect?
Using Fermat's Principle explain why it makes sense for light be refracted when crossing from one medium into another that has a different refractive index.
Convection, conduction and radiation in space