/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 2 The best way to lift a heavy wei... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 12: Problem 2

The best way to lift a heavy weight is to squat with your back vertical, rather than to lean over. Why?

Short Answer

Expert verified
Keeping the back vertical while lifting a heavy weight aligns the upward force exerted directly against gravity, which aids in a more efficient lifting mechanism. Moreover, it ensures the spine bears the load evenly, reducing potential stress that leads to injury. Leaning over disrupts this alignment, creating an imbalanced distribution of weight and increased potential for injury.

Step by step solution

01

Understanding the Forces at Play

When lifting a weight, two forces are primarily at play - the upward force exerted by the lifter and the downward force of gravity. Keeping the back vertical while squatting aligns the force exerted by the lifter directly against gravity, making the lift more efficient.
02

Recognition of Body Mechanism

The reason for keeping the back vertical is related to body mechanics. The spinal column is the main support structure for the body. A vertical back ensures the spine bears the load evenly, reducing potential stress and injury.
03

Analyzing Leaning Over Position

When leaning over, the vertical alignment is disrupted. The force to lift the weight is no longer directly applied against gravity. The uneven distribution of weight can result in strain on lower back muscles and an increase in the potential for harm.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

When the boom rope is horizontal, it can't exert any vertical force. Therefore, a. it's impossible to hold the boom with the boom rope horizontal. b. the boom rope tension becomes infinite. c. the pivot supplies the necessary vertical force. d. the boom rope exerts no torque.

If you take the pivot point at the application point of one force in a static- equilibrium problem, that force doesn't enter the torque equation. Does that make the force irrelevant to the problem? Explain.

Give an example of an object on which the net force is zero, but that isn't in static equilibrium.

A body is subject to three forces: \(\vec{F}_{1}=2 \hat{\imath}+3 \hat{\jmath} \mathrm{N}\), applied at the point \(x=3 \mathrm{~m}, y=0 \mathrm{~m} ; \vec{F}_{2}=-5 \hat{\imath}-7 \hat{\jmath} \mathrm{N}\), applied at the point \(x=-1 \mathrm{~m}, y=2 \mathrm{~m} ;\) and \(\vec{F}_{3}=3 \hat{\imath}+4 \hat{\jmath} \mathrm{N}\), applied at the point \(x=-2 \mathrm{~m}, y=6 \mathrm{~m}\). Show that (a) the net force and (b) the net torque about the origin are both zero.

A rectangular block measures \(w \times w \times L\), where \(L\) is the longer dimension. It's on a horizontal surface, resting on its long side. Use geometrical arguments to find an expression for the angle through which you would have to tilt it in order to put it in an unstable equilibrium, resting on a short edge.
See all solutions

Recommended explanations on Physics Textbooks

Force

Read Explanation

Fundamentals of Physics

Read Explanation

Medical Physics

Read Explanation

Electricity and Magnetism

Read Explanation

Famous Physicists

Read Explanation

Quantum Physics

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.