Question

A crate of fragile dishes is in the back of a pickup truck. The truck accelerates north from a stop sign, and the crate moves without slipping. Does the friction force on the crate point north or south? Or is the friction force zero? Explain.

Short answer

Friction may take many different shapes. Dry friction is the force that opposes the relative lateral motion of two solid surfaces in contact.

Step-by-step solution

Introduction

Friction is the force that keeps solid surfaces, fluid layers, and material components from clashing while they are travelling in the same direction. Friction can appear in a variety of ways, including: Dry friction is the force that opposes the relative lateral motion of two solid surfaces in contact.

Explanation

When an object is placed in a moving frame of reference, the pseudo force acts on it. The direction of pseudo force on an item is always the same as the object's acceleration.

The box hasn't slid since then. As a result, in relation to the vehicle body, the crate will be immobile. This means that the package must be accelerated along the vehicle using a (pseudo) force. The truck's friction with the crate keeps the box in place while allowing the crate to travel along with the vehicle.

As a result, the crate's friction force is directed northward, in the same direction as the truck's velocity.