Carrying Groceries: Calculate the Work Done

  • Thread starter Thread starter Timmy1221
  • Start date Start date
AI Thread Summary
To calculate the work done while carrying a 7.0-kg bag of groceries 1.2 m above the floor at a constant velocity, one must consider the force applied and the distance moved. The work done can be determined using the formula W = F × d × cos(θ), where F is the force, d is the distance, and θ is the angle between the force and the direction of motion. Since the bag is carried at a constant height, the vertical component of the force does not contribute to the horizontal work done. The discussion emphasizes understanding the direction of the applied force and how to calculate work based on force and distance. Properly applying these concepts will lead to the correct solution for the problem.
Timmy1221
Messages
9
Reaction score
0

Homework Statement


  1. You carry a 7.0-kg bag of groceries 1.2 m above the level floor at a constant velocity of 75 cm/s across a room that is 2.3 m wide. How much work do you do on the bag in the process?

Homework Equations


KE=(1/2)(m)(v^2)

The Attempt at a Solution


I haven't a clue where to start. Any help would be appreciated and thanks!
 
Physics news on Phys.org
Timmy1221 said:

Homework Statement


  1. You carry a 7.0-kg bag of groceries 1.2 m above the level floor at a constant velocity of 75 cm/s across a room that is 2.3 m wide. How much work do you do on the bag in the process?

Homework Equations


KE=(1/2)(m)(v^2)

The Attempt at a Solution


I haven't a clue where to start. Any help would be appreciated and thanks!
What force do you apply to the bag for the 2.3m? What direction is that force in? How do you calculate work done based on a force and a distance (preferably as a vector equation)?
 
Timmy1221 said:

Homework Statement


  1. You carry a 7.0-kg bag of groceries 1.2 m above the level floor at a constant velocity of 75 cm/s across a room that is 2.3 m wide. How much work do you do on the bag in the process?

Homework Equations


KE=(1/2)(m)(v^2)

The Attempt at a Solution


I haven't a clue where to start. Any help would be appreciated and thanks!
Start off by writing in words the definition of Work Done that you will need here.
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »
Thread 'Voltmeter readings for this circuit with switches'

Thread 'Voltmeter readings for this circuit with switches'

TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
View full post »
Thread 'Trying to understand the logic behind adding vectors with an angle between them'

Thread 'Trying to understand the logic behind adding vectors with an angle between them'

My initial calculation was to subtract V1 from V2 to show that from the perspective of the second aircraft the first one is -300km/h. So i checked with ChatGPT and it said I cant just subtract them because I have an angle between them. So I dont understand the reasoning of it. Like why should a velocity be dependent on an angle? I was thinking about how it would look like if the planes where parallel to each other, and then how it look like if one is turning away and I dont see it. Since...
View full post »

Similar threads

Which answer is correct? Grocery Bag Net Force Question
Replies
10
Views
7K
Understanding Work: Calculating Work in Different Scenarios
Replies
5
Views
1K
How Much Work Does Ryan Do Lifting and Carrying Potatoes?
Replies
7
Views
2K
Work Done by Gravity and Tension in a Pulley System
Replies
3
Views
2K
Determining Work Done by a Person on a Luggage
Replies
2
Views
1K
Questions about Energy (Work and Power)
Replies
2
Views
1K
Work done on a shopping cart by friction when being pushed
Replies
4
Views
3K
Work Done by Person Carrying Groceries Up a Staircase
Replies
3
Views
3K
Max values for a 2-dielectric capacitor
Replies
21
Views
3K
Calculate the work done moving a crate
Replies
3
Views
3K

Hot Threads

Recent Insights

Back
Top