Recent content by lawofnature

Say only one of the pencils attached was rotating and applying torque on the disc. The other pencil, which just stands idle, would then present a physical obstruction to the disc's movement and not let the disc move. It will do it through the use of normal force. This normal force will only...

You ARE applying the opposing torque by holding the pencils firmly in place and therefore generating the normal force(see picture)

Assume a piston cylinder arrangement. External pressure always equals internal pressure ( reversible conditions ). Now consider these two scenarios: Scenario one: q heat is suddenly added to the arrangement causing a temperature rise and consequently pressure rise, but the volume is yet...

JBriggs, parallel axis theorem works only if we start at the centre of mass of the system and even then using it would be useless as we will get no new information with respect to changed distances r1 and r2 to some other since the change in moment of inertia will be simply m*d^2. And to use...

Ohhhh! The solution is so simple, right in front of us. Just rotate the mass about an axis with centre dist. r1 and r2 for the masses m1 and m2. I do this along one axis to get x co-ordinates. Then move the axis by dist. d, now the masses are at dist. r1+d and r2-d, and rotate again. We can do...