Calculating Horsepower Needed to Lift 150 kg for 20 m in 10 min

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SUMMARY

The calculation for horsepower required to lift a 150 kg box for 20 meters in 10 minutes results in approximately 0.065 horsepower. This is derived from the conversion of energy, where 1 Watt equals 1 Joule per second and 1 Horsepower equals 746 Watts. The low horsepower value is accurate, demonstrating that energy consumption may not always align with intuitive expectations.

PREREQUISITES
  • Understanding of basic physics concepts, specifically work and energy
  • Familiarity with unit conversions between Watts and Horsepower
  • Knowledge of the formula for calculating work done against gravity
  • Basic proficiency in algebra for solving equations
NEXT STEPS
  • Research the formula for calculating work: Work = Force x Distance
  • Learn about gravitational potential energy and its applications
  • Explore the concept of power and its units in different contexts
  • Investigate real-world applications of horsepower in mechanical systems
USEFUL FOR

Students in physics, engineers involved in mechanical design, and anyone interested in understanding energy calculations related to lifting objects.

Pao44445
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Homework Statement


Lifting a box (150 kg) up for 20 meters in 10 minutes, how much horsepower needed?

Homework Equations


1 Watts = 1 Joule/sec
1 Horsepower = 746 Watts

The Attempt at a Solution


I've figured this out but I got a very low horsepower :( about 0.065 hp, does it correct?
 
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Pao44445 said:

Homework Statement


Lifting a box (150 kg) up for 20 meters in 10 minutes, how much horsepower needed?

Homework Equations


1 Watts = 1 Joule/sec
1 Horsepower = 746 Watts

The Attempt at a Solution


I've figured this out but I got a very low horsepower :( about 0.065 hp, does it correct?
Sounds about right.
 
Answers are not always intuitive.
For instance, using the energy consumed by a 100 W bulb for an hour; to what height (using this energy)
could you raise a 100 lb (about 40 kg) bundle of shingles? The answer might surprise you.
 

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