Logout Open In App
Open In App
Warning: foreach() argument must be of type array|object, bool given in /var/www/html/web/app/themes/studypress-core-theme/template-parts/header/mobile-offcanvas.php on line 20

Chapter 6: Problem 67

In Section \(6.2,\) Rosie lifts a trunk weighing \(220 \mathrm{N}\) up $4.0 \mathrm{m} .\( If it take her \)40 \mathrm{s}$ to lift the trunk, at what average rate does she do work?

Short Answer

Expert verified
Answer: The average rate at which Rosie does work is 22 watts.

Step by step solution

01

Find the force exerted by Rosie

To calculate the force exerted by Rosie, we simply use the given weight of the trunk which is 220 N, as the weight is equal to the force exerted when lifting the trunk. Force = 220 N
02

Find the work done

Now, we can find the work done by multiplying the force exerted (220 N) with the distance lifted (4 m). Work = Force x Distance Work = 220 N × 4 m Work = 880 J
03

Calculate the average rate at which Rosie does work

As we have found the work done by Rosie, we can now calculate the average rate of work done by dividing the total work done by the time taken to lift(which is 40 s). Average rate of work = Work done / Time taken Average rate of work = 880 J / 40 s Average rate of work = 22 W The average rate at which Rosie does work while lifting the trunk is 22 watts.

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

How much work must Denise do to drag her basket of laundry of mass $5.0 \mathrm{kg}\( a distance of \)5.0 \mathrm{m}$ along a floor, if the force she exerts is a constant \(30.0 \mathrm{N}\) at an angle of \(60.0^{\circ}\) with the horizontal?
A planet with a radius of \(6.00 \times 10^{7} \mathrm{m}\) has a gravitational field of magnitude \(30.0 \mathrm{m} / \mathrm{s}^{2}\) at the surface. What is the escape speed from the planet?
An airline executive decides to economize by reducing the amount of fuel required for long-distance flights. He orders the ground crew to remove the paint from the outer surface of each plane. The paint removed from a single plane has a mass of approximately \(100 \mathrm{kg} .\) (a) If the airplane cruises at an altitude of \(12000 \mathrm{m},\) how much energy is saved in not having to lift the paint to that altitude? (b) How much energy is saved by not having to move that amount of paint from rest to a cruising speed of $250 \mathrm{m} / \mathrm{s} ?$
A crate of mass \(m_{1}\) on a frictionless inclined plane is attached to another crate of mass \(m_{2}\) by a massless rope. The rope passes over an ideal pulley so the mass \(m_{2}\) is suspended in air. The plane is inclined at an angle \(\theta=36.9^{\circ} .\) Use conservation of energy to find how fast crate \(m_{2}\) is moving after \(m_{1}\) has traveled a distance of $1.4 \mathrm{m}\( along the incline, starting from rest. The mass of \)m_{1}$ is \(12.4 \mathrm{kg}\) and the mass of \(m_{2}\) is \(16.3 \mathrm{kg}\).
In an adventure movie, a 62.5 -kg stunt woman falls \(8.10 \mathrm{m}\) and lands in a huge air bag. Her speed just before she hit the air bag was $10.5 \mathrm{m} / \mathrm{s} .$ (a) What is the total work done on the stunt woman during the fall? (b) How much work is done by gravity on the stunt woman? (c) How much work is done by air resistance on the stunt woman? (d) Estimate the magnitude of the average force of air resistance by assuming it is constant throughout the fall.
See all solutions

Recommended explanations on Physics Textbooks

Radiation

Read Explanation

Conservation of Energy and Momentum

Read Explanation

Atoms and Radioactivity

Read Explanation

Electricity

Read Explanation

Further Mechanics and Thermal Physics

Read Explanation

Nuclear 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