Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 6: Q19P (page 277)

You push a crate3 m across the floor with aforce whose direction is30° below the horizontal. How much work do you do?

Short Answer

Expert verified

Work done after pushing the crate across the floor is 104 N m.

Step by step solution

01

Definition of the work done

Work is the force times the displacement of the item and is the quantity of energy transferred between a source of applied force and the object that this force affects.

The work done as a result of the force is given by orW=F⇀.∆rorW=F⇀r⇀cosθ .

02

Finding work done

Substitute F=40N,∆r=3mθ=30°, into the formula of work done.

W=40×3×cos30°=603=104Nm

Therefore, work done after pushing the crate across the floor is 104Nm.

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

A nucleus whose mass is 3.917268×10−25kg undergoes spontaneous alpha decay. The original nucleus disappears and there appear two new particles: a He-4 nucleus of mass6.640678×10−27kg (an alpha particle consisting of two protons and two neutrons) and a new nucleus of mass3.850768×10−25kg . (Note that the new nucleus has less mass than the original nucleus, and it has two fewer protons and two fewer neutrons.)

(a) What is the total kinetic energy of the alpha particle and the new nucleus?

(b) Use the conservation of momentum in order to determine the kinetic energy of the alpha particle and kinetic energy of the new nucleus.

A boat is coasting toward a dock you're standing on, and as it comes toward you, you push back on it with a force of 300 N. As you do this, you back up a distance of 2m. How much work do you do on the boat?

The escape speed from a very small asteroid is only 24 m/s. If you throw a rock away from the asteroid at a speed of 35 m/s, what will be its final speed?

Figure 6.76 shows the path of a comet orbiting a star.

(a) Rank-order the locations on the path in terms of the magnitude of the comet’s momentum at each location, starting with the location at which the magnitude of the momentum is the largest. (b) Rank-order the locations on the path in terms of the comet’s kinetic energy at each location, starting with the location at which the kinetic energy is the largest. (c) Rank-order the locations on the path in terms of the potential energy of the system at each location, largest first. (d) Rank-order the locations on the path in terms of the sum of the kinetic energy and the potential energy of the system at each location, largest first

A 2kgball rolls off a 30m-high cliff, and lands 25mfrom the base of the cliff. Express the displacement and the gravitational force in terms of vectors and calculate the work done by the gravitational force. Note that the gravitational force is (0,-mg,0), where g is a positive number+9.8N/kg.
See all solutions

Recommended explanations on Physics Textbooks

Quantum Physics

Read Explanation

Physics of Motion

Read Explanation

Engineering Physics

Read Explanation

Electricity and Magnetism

Read Explanation

Waves Physics

Read Explanation

Electrostatics

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