Final answer:
To calculate the work done on a car when moved a distance of 4m, the force applied and the presence of friction are necessary. Without specifics on the force used to move the 3000N car, a numerical answer cannot be determined.
Step-by-step explanation:
If a man wants to move a car of weight 3000N a distance of 4m, the work done on the car is calculated using the formula:
Work = Force x Distance x cos(θ), where θ is the angle between the force and the direction of movement. Assuming the man applies the force in the same direction as the car's movement (the horizontal direction), θ = 0° and cos(0°) = 1.
Since the problem does not specify the amount of force the man applies, we must assume that it is equal to the force required to move the car. If the car is on a frictionless surface, the force needed to move the car would just be the force to overcome inertia, which can be any non-zero value, and if there is friction, it would be the force equal to the frictional force.
However, in real-world scenarios, we actually need information about the applied force and the presence of factors like friction to calculate work done. Without this information, we cannot give a definitive numerical answer.