The Work W (In Joules) Done When Lifting an Object

question 120

Multiple Choice

The work W (in joules) done when lifting an object varies jointly with the mass m (in kilograms) of the object and the height h (in meters) that the object is lifted. The work done when a 120-kilogram object is lifted 1.8 meters is 2116.8 joules. How much work is done when lifting a 190-kilogram object 2.5 meters?

• A) 4655 J
• B) 4635 J
• C) 4665 J
• D) 4675 J
• E) 4645 J

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