Posted by Ashley on Monday, March 26, 2012 at 1:22pm.
NOTE: 1 MJ = 106J.
One of the most powerful cranes in the
world, operating in Switzerland, can slowly
raise a load of 6000 tonne to a height of 8 m.
(1 tonne = 1000 kg)
The acceleration of gravity is 9.81 m/s2 .
How much work is done by the crane?
Answer in units of MJ
- Physics. PLEASE HELP!! - Steve, Monday, March 26, 2012 at 2:42pm
work = force * distance
= 6000 * 1000kg * 9.81 * 8
= 470.88 * 10^6 J
= 471.88 MJ
- Physics. PLEASE HELP!! - Elena, Monday, March 26, 2012 at 2:42pm
Since the load moves at constant speed the force applied by the engine is equal to the gravity force. Therefore, the work is
W=F•h = m•g•h =6•10^6•9.8•8=
= 4.71•10^8 J=471 MJ
Answer This Question
More Related Questions
- Physics - One of the most powerful cranes in the world, operating in Switzerland...
- Physics matter and its properties - A circular metal column is to support a load...
- math - The farmer sells a 41.9915-tonne load to a buyer who takes a single scoop...
- Math - Calculate the mass of water in kg and tonne contained in a rectangular ...
- Physics - Hi Can someone check and advise on this potential energy of 2 tonne of...
- physics - The throttle of an electric train is shut off at a speed of 48 km/h. ...
- physics - A truck of mass 1.0 tonne moving at 4.0 m/s catches up and collides ...
- Maths / physics - Calculate the rest mass (In grams) of an object whose rest ...
- physics - A crane lifts 1 tonne of concrete through a height of 25 m. How much ...
- Science - Which one is longer mts (metre-tonne-second) or km (kilometre)?