Further mechanics centre of mass question

43Explosion

Can someone help me understand why they divide the height by 4 to find the radius instead of just using 20???

Reply 1

mqb2766

Original post by 43Explosion

Can someone help me understand why they divide the height by 4 to find the radius instead of just using 20???

the com is a quarter of the way up the cone.

Reply 2

43Explosion

Original post by mqb2766

the com is a quarter of the way up the cone.

Why can't they use the regular height to find the radius??

Reply 3

mqb2766

Original post by 43Explosion

Why can't they use the regular height to find the radius??

youre told its on the point of toppling at 24 degrees so the com must be vertically above the edge of the base, so that gives your right triangle to get r.

Reply 4

43Explosion

Original post by mqb2766

youre told its on the point of toppling at 24 degrees so the com must be vertically above the edge of the base, so that gives your right triangle to get r.

Thank you, it makes sense to me now i appreciate it