Khi nạp ở nguồn điện ac. giá trị điện áp nạp đầy bằng bao nhiêu? Giải thích

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?

If a simple machine reduces the strength of a force, what must be increased?

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?