Answer :
To determine how much work it will take to lift a 4-kg baby 1 meter into her crib, we can use the formula for work done against gravity:
[tex]\[ \text{Work} = \text{mass} \times \text{gravity} \times \text{height} \][/tex]
Let's break it down step by step:
1. Identify the mass of the object: The baby has a mass of 4 kg.
2. Use the acceleration due to gravity: On Earth, gravity is approximately 9.8 m/s².
3. Determine the height: The height the baby is being lifted is 1 meter.
Substitute these values into the work formula:
[tex]\[ \text{Work} = 4 \, \text{kg} \times 9.8 \, \text{m/s}^2 \times 1 \, \text{m} \][/tex]
4. Calculate the work: Multiply the numbers together.
[tex]\[ \text{Work} = 39.2 \, \text{Joules} \][/tex]
Therefore, the work required to lift the baby into her crib is 39.2 Joules. The correct answer is C. 39.2 J.
[tex]\[ \text{Work} = \text{mass} \times \text{gravity} \times \text{height} \][/tex]
Let's break it down step by step:
1. Identify the mass of the object: The baby has a mass of 4 kg.
2. Use the acceleration due to gravity: On Earth, gravity is approximately 9.8 m/s².
3. Determine the height: The height the baby is being lifted is 1 meter.
Substitute these values into the work formula:
[tex]\[ \text{Work} = 4 \, \text{kg} \times 9.8 \, \text{m/s}^2 \times 1 \, \text{m} \][/tex]
4. Calculate the work: Multiply the numbers together.
[tex]\[ \text{Work} = 39.2 \, \text{Joules} \][/tex]
Therefore, the work required to lift the baby into her crib is 39.2 Joules. The correct answer is C. 39.2 J.
