3. an object of mass $5.0\\text{ kg}$ is lifted vertically upward by $2.0\\text{ m}$. assuming the…

3. an object of mass $5.0\\text{ kg}$ is lifted vertically upward by $2.0\\text{ m}$. assuming the acceleration due to gravity is $9.8\\text{ m/s}^2$, how much work is done against gravity?\n\na. $10\\text{ j}$\nb. $20\\text{ j}$\nc. $49\\text{ j}$\nd. $98\\text{ j}$

3. an object of mass $5.0\\text{ kg}$ is lifted vertically upward by $2.0\\text{ m}$. assuming the acceleration due to gravity is $9.8\\text{ m/s}^2$, how much work is done against gravity?\n\na. $10\\text{ j}$\nb. $20\\text{ j}$\nc. $49\\text{ j}$\nd. $98\\text{ j}$

Answer

Explanation:

Step1: Identify the given physical quantities

$$m = 5.0\text{ kg}, \quad h = 2.0\text{ m}, \quad g = 9.8\text{ m/s}^2$$

Step2: State the work formula against gravity

$$W = mgh$$

Step3: Substitute the values into the formula

$$W = 5.0\text{ kg} \times 9.8\text{ m/s}^2 \times 2.0\text{ m}$$

Step4: Calculate the final value

$$W = 98\text{ J}$$

Answer:

D. 98 J