Final answer:
The work done by a person moving a 4 kg mass at a uniform velocity of 5 m/s for 10 seconds on Mars is zero. This is because work is defined as a force causing displacement, and a uniform velocity indicates no net force acting on the object in the direction of its movement.
Step-by-step explanation:
The question is asking about the work done by a person moving a mass with a uniform velocity on Mars. In physics, work is done when a force causes a displacement. The formula for work is Work (W) = Force (F) × Displacement (s) × cos(θ), where θ is the angle between the force and the displacement vector.
However, since the person is moving the object with a uniform velocity, this implies there's no acceleration, and the net force acting on the object is zero. On Mars, gravity is weaker than on Earth, but this does not affect the work done if there is no net force causing vertical displacement.
In this scenario, the person is not performing any work on the object in the horizontal direction because the velocity is uniform, and thus no horizontal force is being applied over a distance. If the body had been accelerated or had been lifted vertically against the gravitational field of Mars, then we would have had to calculate work accordingly.