required information\na box with a mass of $7\\text{ kg}$ is lifted (without acceleration) through a height…

required information\na box with a mass of $7\\text{ kg}$ is lifted (without acceleration) through a height of $2.3\\text{ m}$, in order to place it upon the shelf of a closet. the value of acceleration due to gravity $g = 9.8\\text{ m/s}^2$.\nnote: this is a multi-part question. once an answer is submitted, you will be unable to return to this part.\nhow much work must a person do to lift the box to this position?\nthe work done to lift the box is j.

required information\na box with a mass of $7\\text{ kg}$ is lifted (without acceleration) through a height of $2.3\\text{ m}$, in order to place it upon the shelf of a closet. the value of acceleration due to gravity $g = 9.8\\text{ m/s}^2$.\nnote: this is a multi-part question. once an answer is submitted, you will be unable to return to this part.\nhow much work must a person do to lift the box to this position?\nthe work done to lift the box is j.

Answer

Explanation:

Step1: Identify the given physical parameters

The mass $m = 7\text{ kg}$, the height $h = 2.3\text{ m}$, and the acceleration due to gravity $g = 9.8\text{ m/s}^2$.

Step2: State the formula for work done

The work done $W$ to lift an object against gravity at a constant speed is equal to the change in gravitational potential energy. $$W = m \cdot g \cdot h$$

Step3: Substitute the values into the formula

$$W = 7\text{ kg} \times 9.8\text{ m/s}^2 \times 2.3\text{ m}$$

Step4: Calculate the final value

$$W = 68.6 \times 2.3 = 157.78\text{ J}$$

Answer:

157.78 J