Question

Sometimes we use 9.8 $m/s^2$ for the value of acceleration due to gravity and sometimes we use 10 $m/s^2$ for the value of acceleration due to gravity. What is the reason behind this?

Answer 1

The actual value of acceleration due to gravity is equal to 9.8 $m/s^2$

But sometimes for simplicity in calculations, we round off the value and assume the approximate value of g as 10 $m/s^2$.

You should assume g value as 9.8 $m/s^2$ unless mentioned in the question as 10 $m/s^2$.