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

Answered by Sameh H. Physics tutor

11264 Views

See similar Physics A Level tutors

Related Physics A Level answers

All answers ▸

Calculate the kinetic energy of a car of mass 1.0*10^3kg moving at speed of 20ms^-1.


Describe and explain the vertical motion of a parachutist which jumps out of an aeroplane at time t=0 and then releases the parachute shortly after reaching terminal velocity at time t=T. (Assume air resistance is not negligible).


A guitar string 0.65m long vibrates with a first harmonic frequency of 280Hz. Mary measures 1m of the string and discovers that it weighs 8.0x10^-4 kg. What is the tension in the guitar string?


A capacitor discharge circuit of time constant 45ms includes a capacitor and resistor. The capacitor has a capacitance of 18µF What is the resistance of the resistor?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences