Final answer:
The weight of an object with a mass of 10 kg on Earth is calculated using the formula w = m×g. Using the acceleration due to gravity of 9.8 m/s², the weight is found to be 98 N. Therefore, the correct answer is a. 98 N.
Step-by-step explanation:
The weight of an object is calculated by multiplying its mass (m) by the acceleration due to gravity (g), which is approximately 9.8 m/s² on Earth. Given that the mass (m) of the object is 10 kg, the weight (w) can be determined by the formula w = m×g. Therefore, the weight of the object is:
w = 10 kg × 9.8 m/s² = 98 N.
So, the correct answer is a. 98 N.
It's important to note that while the value of g is approximately 9.8 m/s², it can be rounded to 10 m/s² for simplicity in certain contexts, with the understanding that this approximation may not provide a precise calculation. However, in this case, we use the exact value of 9.8 m/s² for an accurate weight calculation.