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The cable of a crane is lifting a 950 kg girder. The girder increases its speed from 0.25 m/s to 0.75 m/sin a distance of 5.5m

a) How much work is done by gravity?
b) How much work is done by tension?

User Bizley
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1 Answer

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Final answer:

To calculate the work done by gravity and tension in lifting a girder, you can use the formulas work = force x distance. The force of gravity can be calculated using the weight = mass x acceleration due to gravity formula.

Step-by-step explanation:

To calculate the work done by gravity, we can use the formula:

work = force x distance

Since the girder is lifted vertically, the force of gravity is equal to the weight of the girder, which is given by the formula:

weight = mass x acceleration due to gravity

To calculate the work done by tension, we can use the formula:

work = force x distance

Where the force is the tension in the cable, and the distance is the distance the girder is lifted.

Using these formulas and the given values, we can calculate the work done by gravity and tension.

User Elquimista
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