Auniform solid sphere rolls down an incline without slipping. if the linear acceleration of the center of mass of the sphere is 0.24g, then what is the angle the incline makes with the horizontal?

What is work? how much work is done to move an object 0 meters?

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 11.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.80 m/s; (b) he is then lifted at the constant speed of 4.80 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 78.0 kg rescue by the force lifting him during each stage

Which changes of state do the labels represent? a: b: c: