How much work is done by a person lifting 2 Kg object from a bottom of a well at constant speed of 2 m is

( work =...... kj )

To calculate the work done by a person lifting an object, we need to use the formula:

Work = Force × Distance × Cosine(θ)

Where:
- Force is the force applied to lift the object,
- Distance is the distance over which the object is lifted,
- θ (theta) is the angle between the force and the direction of motion.

In this case, we are given the following information:
- Mass of the object (2 kg)
- Speed of lifting (constant at 2 m/s)
- Height of the well (unknown)

To calculate the work done, we can start by determining the force required to lift the object. The force can be calculated using Newton's second law:

Force = Mass × Acceleration

Since the object is being lifted at a constant speed, the acceleration is zero (assuming no external forces, such as friction). Therefore, the force required to lift the object is simply its weight.

Weight = Mass × Gravity

Gravity is approximately 9.8 m/s² on Earth.

Next, we need to find the distance over which the object is lifted. Since the object is being lifted vertically from the bottom of a well, the distance is equal to the height of the well.

Finally, since the object is being lifted vertically, the angle between the force and the direction of motion is 0 degrees. Therefore, the cosine of 0 degrees is 1.

Now, let's calculate the work done:

1. Calculate the force:
Force = Mass × Gravity
Force = 2 kg × 9.8 m/s²

2. Determine the distance:
Distance = Speed × Time
Since the speed is constant at 2 m/s, we need to know the duration (time) of the lifting operation to determine the distance. Please provide the time taken to lift the object.

3. Substitute the force, distance, and angle values into the work formula:
Work = Force × Distance × Cosine(0)
Work = (2 kg × 9.8 m/s²) × Distance × 1

Once we have the time duration, we can plug it into the formula to calculate the work done in kilojoules.

2m is not a speed. You must mean that he lifts the mass 2m at a constant speed. The speed is not needed.

Work done is M*g*H

H = 2.0 m
M = 2.0 kg
g = the acceleration of gravity. Use the Earth value.