What fuels could you use to create a fire? also, why would it be useful to light a fire if you were shipwrecked. you very much ♥ ☺

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?

Could someone . i have tried to solve myself but my calculation is off

What is the speed of an object at a given moment?