An 800 kg car is going around a circular track that has a radius of 200 m and is banked at 30o. The track surface is icy and frictionless. At what speed must the car go to avoid skidding sideways?

Truck traveling west on the highway experiences an acceleration to the east. what could be the cause of this acceleration

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?

What component of earth’s atmosphere exists entirely as a result of photosynthesis?