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

Question

Quizplus · Accepted Answer

The work done is calculated using the formula W = k * m * h. First, find the constant k using the given values: 2116.8 = k * 120 * 1.8, which gives k = 9.8. Then, calculate the work for the new values: W = 9.8 * 190 * 2.5 = 4655 J.

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