Recent content by teeheehee

Kinetic energy?

Momentum? Inertia? Honestly I have no clue of where to start here.

Homework Statement A large turntable of radius 6 m and moment of inertia I = 500 kg m^2 about its center is rotating with an angular velocity of 1 radian/s. A girl of mass 30 kg standing at the exact center moves slowly outward to the edge of the turntable. a) What is the angular...

Their mass becomes one?

Oh! It's because velocity changes, right?

Thanks! That was easier than I expected. What about part d? Why isn't kinetic conserved? This concept never really made much sense to me.

A car of mass m moving East at speed v (v << c no need to use relativity) collides with another car of mass 2 m moving North with speed 3v. a) What are the x and y components of the center of mass velocity of the system just before the collision? b) If the cars stick together during the...