Recent content by stella77

the initial energy is the potential energy right??

here's the drawing...

Conservation of Energy please help! Homework Statement An 840 kg roller coaster car is launched from a giant spring of constant k=31kN/m into a frictionless loop-the-loop track of radius 6.2m, what is the minimum amount that the spring must be compressed if the car is to stay on the track...

Elastic collision please help! Homework Statement Please help me... A 200 g block is released from rest at a height of 25 cm on a frictionless 30 degree incline. it slides down the incline and then along a frictionless surface until it collides elastically wt an 800 g block at rest...