Body Mechanic Physics: Bicep Curl, Lifting a box, and Tiptoe Tendon Force

[@thuonghoang530]

thank for your lectures, I am a teacher, I would like to know exactly the divide you used to draw lectures beautifully?

[@tinula]

in Ry force direction(vertical) how you ignore +Tsin10 portion which is upward force. that isn't required for the calculation here

[@PivithuruRajapaksha]

Ry + T sin 10 - Fg - 200 as it should be correct in question 2 force equilibrium in y direction

[@tinula]

Sir in Question 3) when the two angles are differ (12 & 20 degree) it's not possible to ignore torque of R? can one explain this please

[@hussain55019]

force is acting at an angle why haven't you resolved it?