RoboticNaruto4693 RoboticNaruto4693
  • 03-01-2018
  • Physics
contestada

How much work is done when a hoist lifts a 290-kg rock to a height of 7 m?

Respuesta :

samuraijack
samuraijack samuraijack
  • 03-01-2018
Given: Mass m = 290 Kg;  Height  h = 7 m

Required: Work = ?

Formula: Work = Force x distance  but, Force F = mg

W= fd

W = mgh

W= (290 Kg)(9.8 m/s²)(7 m)

W = 19,894 Kg.m²/s²

W = 19,894  J




  
Answer Link

Otras preguntas

help on questions 11 and 15 Add and simplify if possible
What force is thought to be an important cause plate tectonic motion ?
What is the gram-formula mass of Fe(NO3)3? (1) 146 g/mol (3) 214 g/mol (2) 194 g/mol (4) 242 g/mol
Given the balanced ionic equation: 3Pb2+ + 2Cr ==> 3Pb + 2Cr3+ What is the number of moles of electrons gained by 3.0 moles of lead ions? (1) 5.0 mol (3)
round 75.4614 to the nearest thousandth
When must all men register for the Selective Service?
The concentration of a solution can be expressed in (I ) milliliters per minute (2) parts per million (3) grams per Kelvin (4) joules per gram
There were 13 original states. Name three.
During the Cold War, what was the main concern of the United States?
Why do some states have more Representatives than other states?