What is the velocity of an 500- kilogram elevator that has 4000 joules of energy

14. a body is projected with velocity vi from a.at the same time another body is projectedvertically upwards from point b withvelocity v2 lies vertically below the highestpoint. both the bodies collide thenv2÷v1is

Ajoint produces movement when its angle decreases. which type of movement is it?

Based on this activity, is kinetic energy always transformed into potential energy?