Download the App!

Get 24/7 study help with the Numerade app for iOS and Android! Enter your email for an invite.

Get the answer to your homework problem.

Try Numerade free for 7 days

Like

Report

A 55-kg box is being pushed a distance of 7.0 m across the floor by a force $\overrightarrow{\mathbf{P}}$ whose magnitude is 160 $\mathrm{N}$ . The force $\overrightarrow{\mathbf{P}}$ is parallel to the displacement of the box. The coefficient of kinetic friction is 0.25.Determine the work done on the box by each of the four forces that act on the box. Be sure to include the proper plus or minus sign for the work done by each force.

$=-943 J$

Physics 101 Mechanics

Chapter 6

Work and Energy

Work

Kinetic Energy

Dolly V.

August 11, 2021

Object A is moving due east, while object B is moving due north. They collide and stick together in a completely inelastic collision. Momentum is conserved. Object A has a mass of mA = 16.8 kg and an initial velocity of = 8.12 m/s, due east. Object B, ho

Cornell University

University of Washington

University of Winnipeg

McMaster University

Lectures

03:47

In physics, the kinetic en…

02:08

In physics, work is the tr…

01:49

You push a 67 -kg box acro…

04:59

A 40.0 -kg box initially a…

04:41

A 5.0-kg box rests on a ho…

0:00

In Fig. $7-32,$ a constant…

02:03

Dirk pushes on a packing b…

01:02

A worker pushes a box hori…

04:14

Calculate the work done by…

02:56

You want to push a $65-\ma…

02:07

A 2.0 -migh box with a 1.0…

04:58

A 6.00-kg box sits on a ra…

03:49

A box is dragged across th…

04:48

$\bullet$$\bullet$ A perso…

03:01

A warehouse worker exerts …

04:23

A box with mass 10.0 kg mo…

01:56

(II) A box of mass 6.0$\ma…

08:55

You are lowering two boxes…

02:20

(I) A force of 48.0 $\math…

10:05

A 2.0-m-high box with a 1.…

02:24

A 1.5 $\mathrm{kg}$ box is…

02:15

A box with a mass of 10 $\…

Okay, so let's start by making a free body diagram to see all the forces acting on this box. So we have first of all, the Force P which is being applied on it. We have the force off gravity, so there's a gravitation force. We have a normal force and we also have a force of kinetic friction. So those are the four forces we have to deal with. Now let's find the work done by the force. P work is equal to the product of force and displacement. So 1 60 times seven gives me 1120 Jules, the work done by gravity since the force of gravity is perpendicular to the direction of motion. Therefore, the work done by gravity would be zero in the same way. The footwork and by the normal force would also be zero jewels because the normal force is perpendicular to the direction of motion. So let me just go ahead and put s there just for reference or as his equal to 7.0 meters. Now let's talk about the work done by the force of friction. Now that would be a negative work because the force off friction is in opposite direction to the displacement. And since it's ah simple case off a box sitting on a horizontal surface so the force off friction would be equal to mu as times sorry, UK times, FN times S and f n in this case would be cool to mg. So we can now actually start putting some numbers and so negative 2.5 times 55 times 9.8 times seven. So that gives me the workout by friction is equal to no negative. 943 jewels.

View More Answers From This Book

Find Another Textbook

In physics, the kinetic energy of an object is the energy which it possesses…

In physics, work is the transfer of energy by a force acting through a dista…

01:53

As background for this problem, review Conceptual Example 6. A 7420-kg satel…

03:29

A 35-kg crate rests on a horizontal floor, and a 65-kg person is standing on…

03:02

A space traveler weighs 540.0 N on earth. What will the traveler weigh on an…

03:38

Consult Multiple-Concept Example 10 in preparation for this problem. Traveli…

02:30

A model rocket is constructed with a motor that can provide a total impulse …

01:57

As a sailboat sails 52 m due north, a breeze exerts a constant force $\overr…

05:39

Two particles are located on the $x$ axis. Particle 1 has a mass $m$ and is …

03:32

Two arrows are shot vertically upward. The second arrow is shot after the fi…

02:23

A criminal is escaping across a rooftop and runs off the roof horizontally a…

A bus makes a trip according to the position-time graph shown in the illustr…