Recent content by Zayin

*headdesk* Thanks.

Heh heh. I know, but using the sine rule makes me feel fancy. :< So I did this, and solved along the x axis: \begin{equation*} \begin{split} k \ \frac{q^2}{r^2}cos5° - mgsin5° & = & & 0 \\ ∴ kq^2cos5° & = & & r^2mgsin5° \\ ∴ q & = & & \sqrt{\frac{r^2mgsin5°}{kcos5°}} \\ & = & &...

In inelastic collisions, momentum is conserved but kinetic energy is not. In elastic collisions, momentum and kinetic energy are conserved. Therefore Newton's Cradle is an example of an elastic collision because, as you said, all kinetic energy is being transferred from one ball to the other...

(solved) Finding charges in a pendulum in equilibrium Homework Statement Two small metallic spheres, each of mass 0.20 g, are suspended as pendulums by light strings from a common point. The spheres are given the same electric charge, and it is found that the two come to equilibrium when...