Carrying Groceries: Calculate the Work Done

  • Thread starter Timmy1221
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In summary, the question is asking how much work is done on a 7.0-kg bag of groceries that is being carried 1.2 m above the floor at a constant velocity of 75 cm/s across a 2.3 m wide room. The relevant equation is KE=(1/2)(m)(v^2) and the student is unsure of how to approach the problem. They are then prompted to think about the force applied to the bag and the direction of that force in order to calculate work, and to start by defining the concept of Work Done in words.
  • #1
Timmy1221
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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!
 
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  • #2
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)?
 
  • #3
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.
 

1. How is work calculated when carrying groceries?

Work is calculated by multiplying the force applied to carry the groceries by the distance the groceries are carried. This can be represented by the formula W = F x d, where W is work, F is force, and d is distance.

2. What is the unit of measurement for work?

The unit of measurement for work is the joule (J). In the context of carrying groceries, the work done would typically be measured in joules.

3. Does the weight of the groceries affect the amount of work done?

Yes, the weight of the groceries does affect the amount of work done. The heavier the groceries, the more force is required to carry them and the more work is done.

4. How does the angle of incline affect the work done when carrying groceries?

The angle of incline can affect the work done when carrying groceries if the groceries are being carried up or down a slope. This is because the force required to move the groceries against gravity increases as the angle of incline increases, resulting in more work being done.

5. Are there any other factors that can affect the work done when carrying groceries?

Yes, there are other factors that can affect the work done when carrying groceries. These include the speed at which the groceries are carried, as well as any additional forces such as wind resistance or friction. The surface on which the groceries are being carried can also affect the amount of work done.

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