A student is moving to college and packs a box so full that they can’t lift it. The student realizes they can push the box across the slick floor to get it to the door. The student applies a force of 40N to the 20 kg. Assume there is negligible friction between the box and the floor. Calculate the magnitude of the box’s acceleration.
Your answer should have one significant figure.

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?

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?

Awoman holds a book by placing it between her hands such that she presses at right angles to the front and back covers. the book has a mass of m = 1.8 kg and the coefficient of static friction between her hand and the book is μs = 0.67. no attempt 50% part (a) what is the weight of the book, fgb in newtons?