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A construction worker is carrying a load of 40 kilograms over his head and is walking at a constant velocity. If he travels a distance of 50 meters, how much work is being done?
A. 0 joules
B. 2.0 × 102 joules
C. 2.0 × 103 joules
D. 1.9 × 104 joules ...?

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MissPhiladelphia
In physics, a force is said to do work if, when acting, there is a displacement of the point of application in the direction of the force. It is expressed as:

W = F x d
W = m x a x d
W = 40 x 0 x 50 = 0 J

Acceleration is zero because it is at a constant velocity. Therefore, the correct answer is option A.
ghostcd40

Answer:

The answer is C. 2.0 x 10^3

Explanation:

to calculate work you to F x d 4.

so 40 x 50 is 2000

2.0 x 10^3 = 2000

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