Homework Statement
Inside evenly charged (with charge Q < 0) sphere with radius R is evenly charged sphere with potential equal to potential in infinity and radius R/2. Both sphere are concentric.
From internal sphere, tangentially to it fly out electron (with charge e < 0). What is minimal...
Alright, so for b) I have these two equations to solve for v_{r}(ramp speed) andv_{c}(cart speed):
mv^2/2=mv_{r}^{2}/2+mv_{c}^{2}/2+mgh
mv=mv_{c}+m_{r}
And then I only have to calculate horizontal projection range and substract distance ramp moved during cart's free fall?
So my second equation is:
mv=2mv_{0}
and the solution for a) therefore is:
v = 2√{gh}
But what concerns me isn't there a normal(normal to ramp) force acting on cart when it rolls, which might has horizontal component because ramp is at some angle to surface.
Homework Statement
On flat surface there is small cart m and big, initally resting ramp with mass m and height h.
a) At what speed should the cart travel to roll on the flat area on top of the ramp and stop relativly to it?
b) Assuming that cart moves with speed greater than calculated in a)...