Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 4: Q24CQ (page 160)

A cartoon shows the toupee coming off the head of an elevator passenger when the elevator rapidly stops during an upward ride. Can this really happen without the person being tied to the floor of the elevator? Explain your answer.

Short Answer

Expert verified

No, this is not possible, except if some other external upward force would be applied to it in addition to the force of gravity pulling down the passenger.

Step by step solution

01

Concept of the law of inertia


According to Newton’s first law of motion (law of inertia), a body will continue its state of motion with constant speed or remain at rest until or unless acted by some external force.

02

Explanation for toupee not coming off the head in an elevator

No, this is not possible, except if some other external upward force would be applied to it in addition to the force of gravity pulling down the passenger.

The toupee will only leave the head. All the operating forces are removed from it except the force of gravity. Gravity pulls down with an acceleration of 10 m/s2. If the passenger moves down faster means some additional force is pulling him down. Air resistance is neglected here.

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.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

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

Consider the baby being weighed in Figure 4.34.

(a) What is the mass of the child and basket if a scale reading of 55 N is observed?

(b) What is the tension T1 in the cord attaching the baby to the scale?

(c) What is the tension T2 in the cord attaching the scale to the ceiling, if the scale has a mass of 0.500 kg?

(d) Draw a sketch of the situation indicating the system of interest used to solve each part. The masses of the cords are negligible.

Integrated Concepts When starting a foot race, a 70.0-kg sprinter exerts an average force of 650 N backward on the ground for 0.800 s.

(a) What is his final speed?

(b) How far does he travel?

An American football lineman reasons that it is senseless to try to out-push the opposing player, since no matter how hard he pushes he will experience an equal and opposite force from the other player. Use Newton’s laws and draw a free-body diagram of an appropriate system to explain how he can still out-push the opposition if he is strong enough.

A 1100-kg car pulls a boat on a trailer.

(a) What total force resists the motion of the car, boat, and trailer, if the car exerts a 1900-N force on the road and produces an acceleration of 0.550 m/s2? The mass of the boat plus trailer is 700 kg.

(b) What is the force in the hitch between the car and the trailer if 80% of the resisting forces are experienced by the boat and trailer?

A nurse pushes a cart by exerting a force on the handle at a downward angle 35.0º below the horizontal. The loaded cart has a mass of 28.0 kg, and the force of friction is 60.0 N.

(a) Draw a free-body diagram for the system of interest.

(b) What force must the nurse exert to move at a constant velocity?
See all solutions

Recommended explanations on Physics Textbooks

Magnetism and Electromagnetic Induction

Read Explanation

Physics of Motion

Read Explanation

Particle Model of Matter

Read Explanation

Solid State Physics

Read Explanation

Work Energy and Power

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.

Sign-up for free