What is the acceleration of a 1107 kg car as it comes to rest with a force of 2242 n in 6.9 seconds?

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

We put a force of 50n on an object and the acceleration is 100 m/s². what is the mass of the object?

The speed of light can be used to measure the