Calculating Time to Lift 300kg Piano 10 Meters with 400 Watts Power

Click For Summary
SUMMARY

The discussion centers on calculating the time required to lift a 300 kg piano to a height of 10 meters using a crane that provides 400 watts of power. The formula used is time = work/power, where work is calculated as mass multiplied by gravity and height. The calculation yields a time of 73.5 seconds. However, participants note that this estimate is an underestimate due to factors such as acceleration and potential inefficiencies in the lifting process.

PREREQUISITES
  • Understanding of basic physics concepts, specifically work and power
  • Familiarity with the formula for calculating work (Work = mass x gravity x height)
  • Knowledge of significant figures in scientific calculations
  • Basic grasp of crane operation and lifting mechanics
NEXT STEPS
  • Research the effects of acceleration on lifting time in physics
  • Learn about efficiency losses in crane operations
  • Explore the concept of significant figures in engineering calculations
  • Investigate alternative lifting methods and their power requirements
USEFUL FOR

Engineers, physics students, crane operators, and anyone involved in lifting heavy objects or studying mechanical power applications.

PhunWithPhysics
Messages
24
Reaction score
0
I have a 300 kg piano being lifted at a steady speed from the ground to a hieght of 10 meters and the crane that is doing the lifting is providing 400 watts of power. How much time does it take to get the piano to the top.
So far I have Power = work/Time
so time is Work/ power , so, work is equal to mass X gravity X hieght
so I have (300)(9.8)(10)/(400) = 73.5 sec...is this correct...any help would be nice. Thanks
 
Physics news on Phys.org
For the information you have, it looks fine, although you'll want to check the significant digits.

It is, of course, an underestimate - do you see why?
 

Similar threads

How Much Time Does It Take to Lift a 300 kg Piano 10 Meters?
  • · Replies 1 ·
Replies
1
Views
2K
How many crates can you load in a minute with different average power outputs?
  • · Replies 1 ·
Replies
1
Views
2K
Calculating Horsepower Needed to Lift 150 kg for 20 m in 10 min
  • · Replies 2 ·
Replies
2
Views
2K
Calculate Time to Lift Piano: 132kg Piano, 7.3m High, 470W Power
  • · Replies 3 ·
Replies
3
Views
2K
Potential Energy and Work done to lift object distance h
  • · Replies 1 ·
Replies
1
Views
2K
Power output of a hydroelectric plant
  • · Replies 4 ·
Replies
4
Views
3K
Answer: Battery Driven Winch - 13.5 m Lift Height
  • · Replies 7 ·
Replies
7
Views
3K
Power for accelerating a ski lift
  • · Replies 7 ·
Replies
7
Views
10K
Lifting a 2.80*10^2 kg Piano: How Long Does it Take?
  • · Replies 3 ·
Replies
3
Views
2K
Work done by a person lifting and then throwing a ball
  • · Replies 1 ·
Replies
1
Views
2K