Recent content by ols500

Here:

Is it because the weight force lies outside the base area of the object so it tips over. With a book vertical the base area is much smaller so much less angle can be applied before it tips over.

no its my fault not understanding!

im so confused now :woot:

Ah okay. Yes sum of moments about COG is 0

Hi so would this be a correct diagram?

Thank you this made sense now, like if the force pushing it forward suddenly stopped, the frictional force would "rotate" it forward, so from the questions point of view this is clockwise.

And for the principle of moments Sum of CWM= Sum of ACWM for a body in equilibrium

Ah okay thanks, so for moments its = force x perpendicular distance from line of action to the pivot. For direction, here's an example I know:

Hi, what's torque? I am doing A level physics, i don't think we have been taught that or the r vector?

Hi so with this question, I am really confused. Even from the start. Like it doesn't tell us where the force is acting on. From top of block, middle of block etc? And I know how to determine the direction of moment for something on a pivot, not in this scenario though. The answer is A. They did...