A railway engine is being used to try to pull a wagon along a level track. The wagon’s brakes are on, and the wagon does not move. Name the force which prevents the wagon from moving.

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What determines the amount of inertia an object has

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?