Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 7: Q. 38 (page 179)

The coefficient of kinetic friction between the 2.0kgblock in FIGURE P7.38 and the table is 0.30. What is the acceleration of the 2.0kg block?

Short Answer

Expert verified

Acceleration of the block is6.91m/s2.

Step by step solution

01

Given information

Coefficient of friction between 2kgblock and table, μ=0.3

Given the figure of three blocks

02

Explanation

Consider the net force applied by 1kgblock

localid="1649647806258" F1=1kg×9.81m/s2=9.81Nrighttoleft

The friction force applied to the block 2

localid="1649647844745" F2=2kg×0.3×9.81m/s2=5.8Nrighttoleft

The force applied by the block 3

localid="1649647866757" F3=3kg×9.81m/s2=29.43Nlefttoright

Net force o block 2

localid="1649647898415" F=29.43N-5.8N-9.81N=13.82N

The acceleration of the block is calculated as

localid="1649647916525" F=ma13.82N=2kg×aa=6.91m/s2

Acceleration of the block is6.91m/s2.

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

Teams red and blue are having a tug-of-war. According to Newton’s third law, the force with which the red team pulls on the blue team exactly equals the force with which the blue team pulls on the red team. How can one team ever win? Explain

FIGURE P7.26shows two strong magnets on opposite sides of a small table. The long-range attractive force between the magnets keeps the lower magnet in place.

a. Draw an interaction diagram and draw free-body diagrams for both magnets and the table. Use dashed lines to connect the members of an action/reaction pair.

b. The lower magnet is being pulled upward against the bottom of the table. Suppose that each magnet’s weight is 2.0Nand that the magnetic force of the lower magnet on the upper magnet is 6.0N. How hard does the lower magnet push against the table?

FIGUREEX7.16shows two 1.0kgblocks connected by a rope. A second rope hangs beneath the lower block. Both ropes have a mass of 250g. The entire assembly is accelerated upward at 3.0m/s2by force F→

a. What is F?

b. What is the tension at the top end of rope 1?

c. What is the tension at the bottom end of rope 1?

d. What is the tension at the top end of rope 2?

A 50-cm-diameter, 400 g beach ball is dropped with a 4.0 mg ant riding on the top. The ball experiences air resistance, but the ant does not. What is the magnitude of the normal force exerted on the ant when the ball’s speed is 2.0 m/s?

How does a rocket take off? What is the upward force on it?Your explanation should include an interaction diagram and free-body diagrams of the rocket and of the parcel of gas being exhausted.
See all solutions

Recommended explanations on Physics Textbooks

Linear Momentum

Read Explanation

Oscillations

Read Explanation

Space Physics

Read Explanation

Turning Points in Physics

Read Explanation

Engineering Physics

Read Explanation

Astrophysics

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