Final answer:
The weight of the object is calculated using the work done formula, resulting in a weight of 50 N when 150 J of work is required to lift the object 3 meters at a constant speed.
Step-by-step explanation:
The question asks us to calculate the weight of an object when a test reveals that 150 J of work is required to lift it 3 meters at a constant speed. To find the weight of the object, we need to use the formula for work done (Work = Force x Distance). Since the object is lifted at a constant speed, the force exerted will be equal to the weight of the object. Hence, we can determine the weight (Force) by rearranging the formula as Force = Work / Distance. Substituting the given work and distance into the formula, we get Force = 150 J / 3 m = 50 N. Therefore, the weight of the object is 50 N.