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.
Hydrogen has a single proton and a single electron. Find the electric potential at a distance of 0.50 * 10^(-10) (m) from the proton.
How to solve horizontally-launched projectile motion problems using equations of motion?
What speed do satellites orbit at?