A ball mass 2kg rests on a slope of angle 60 degrees. If it is stationary, calculate the coefficient of static friction

Because the ball is stationary, the sum of the forces acting on it must be equal to 0. We can split the ball's weight into two components: perpendicular and parallel to the slope.W(para)=2gsin60W(perp)=2gcos60The frictional force is equal to the coefficient of friction multiplied by the normal reaction force. We know this reaction force, N, must balance W(perp)N=W(perp)=2gcos60Since the frictional force (F=uN) must be equal to W(para), we can find the coefficient of friction by dividing W(para) by N, to give u=tan60

ME
Answered by Milo E. Physics tutor

1464 Views

See similar Physics IB tutors

Related Physics IB answers

All answers ▸

Give the unit of energy, using only the base SI units kg, m and s.


Why does the equation for gravitational potential energy give a negative value if energy cannot be negative.


Distinguish between internal energy and temperature


How do you tackle a general mechanics question?


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