Recent content by R_moor

For this I meant that you could have a vertical axis pass through the CM of mass, which will pass through the tip of the pyramid.

Thank you this is what I did, I found the Centre of mass and noticed that there were two simple geometric figures left, A smaller pyramid at the top, and a trapezoid at the bottom. Since: Mass = density * volume and the density of both parts are the same, then the mass of each slice should...

Sorry for late reply, Thanks for the help !

I have a test coming up next week and while doing some practice questions I found one I can't wrap my head around. The question is: A pyramid (assume uniform density) is divided in two parts by a horizontal plane through its center of mass. How do the masses of the two parts compare ? There are...

Sorry I'm not sure what you mean by working it backwards. Could you explain a little more please

Homework Statement The questions showed in the pictures ask me whether the collisions in the drawings could be elastic or inelastic, I am not given any mass, the angles are a little vague but I think B and C are supposed to be π/2 and π respectively. For velocity, I am just given the direction...

Thanks Everyone !

I see thank you. Do you know how could I prove this mathematically ?

Okay, thank you for your response I think it helped me to get started. So I looked at the graphs and wrote an equation for each of the velocities : 1) V_1 = 150cos(t) +50 2) V_2 = -50cos(t) +50 (From here on I used: V_cm = 1/M * [ m_1V_1 + m_2V_2]) After this I evaluated both V's at t = 0...

Homework Statement Given a graph (see below) containing the velocities of two stars with respect to the sun, I am asked to calculate the velocity of the centre of mass of a binary system. I am not given the mass of either star, nor the shape of the orbit nor the velocity of the centre of mass...