Work Done by Horse in 11.8 min: 190904 N*m

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Homework Help Overview

The problem involves calculating the work done by a horse pulling a cart with a specified force and angle over a given time period. The context includes concepts from physics related to work, force, and power.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the use of the equation for work, questioning their calculations of distance and time conversion. There is confusion regarding the correct time in seconds and the interpretation of the problem's requirements.

Discussion Status

Participants are actively engaging with the problem, checking their calculations and questioning assumptions about time conversion and units. There is acknowledgment of confusion regarding the expected units for the answer, with some participants suggesting that the answer may need to be expressed in kilojoules.

Contextual Notes

There is a noted discrepancy in the conversion of time from minutes to seconds, with participants providing different values. The original poster and others express uncertainty about the correctness of their calculations and the expected format of the final answer.

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horse power

A horse pulls a cart with a force of 180.0 N at and angle of 26.0o with respect to the horizontal and moves along at a speed of 6.0 km/hr. How much work does the horse do in 11.8 min?

ok I use the equation Fcos(theta)d=W

6km/hr=1.67m/s
11.8min=708s

so 708*1.67=1182 m 1182m *180N*cos(26)=190904 N*m which is wrong
 
Last edited:
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Trousers said:
A horse pulls a cart with a force of 180.0 N at and angle of 26.0o with respect to the horizontal and moves along at a speed of 6.0 km/hr. How much work does the horse do in 11.8 min?

ok I use the equation Fcos(theta)d=W

6km/hr=1.67m/s
11.8min=720s

so 720*1.67=1180 m 1180m *180N*cos(26)=190904 N*m which is wrong

what I am doing wrong?

Power is watts = N*m/s

Edit: Oh I see they want work. I was confused by your title.
 
Last edited:
11.8 min is not 720 sec.
 
if I use 708 seconds it's still wrong
 
Trousers said:
if I use 708 seconds it's still wrong

I see that it still works out to 1180.

Perhaps they want the answer in Joules, or KJ
 
thanks it was in kJ
 

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