I WILL MARK BRAINLIEST! A 50 kg girl stands on a skateboard at rest. She jumps off at 2 m/s to the right. What is the velocity of the 7 kg skateboard? Show all work.

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 are the three ways that an object can accelerate

Debris produced by mining is called