The mass of a newborn baby is 4.2kg what is the baby’s weight
The correct answer and explanation is:
To calculate the weight of a newborn baby, we need to use the formula: Weight=Mass×Gravitational acceleration\text{Weight} = \text{Mass} \times \text{Gravitational acceleration}
The mass of the newborn baby is given as 4.2 kg. Gravitational acceleration on Earth is approximately 9.8 m/s29.8 \, \text{m/s}^2.
Now, applying the values into the formula: Weight=4.2 kg×9.8 m/s2\text{Weight} = 4.2 \, \text{kg} \times 9.8 \, \text{m/s}^2 Weight=41.16 N\text{Weight} = 41.16 \, \text{N}
Therefore, the baby’s weight is 41.16 Newtons (N).
Explanation:
Weight is a force, which is calculated as the mass of an object multiplied by the gravitational acceleration. The unit of mass is kilograms (kg), while the unit of weight is Newtons (N). Gravitational acceleration is constant on Earth and is roughly 9.8 m/s29.8 \, \text{m/s}^2. This value can vary slightly depending on the location on Earth, but for most practical purposes, it is approximated as 9.8 m/s².
The mass of an object tells us how much matter it contains, whereas the weight is the force with which the object is pulled toward the center of the Earth due to gravity. On the surface of the Earth, the weight of an object depends on its mass and the gravitational pull acting on it. In this case, the mass of the newborn baby is 4.2 kg, and multiplying it by the gravitational acceleration gives us the weight of 41.16 N. This means the newborn experiences a downward force of 41.16 Newtons due to gravity.