Respuesta :
Assuming you're using the approximation g = 9.8, this means 9.8x is the force of the rock when it hits the ground. Set this equal to 98 and solve for x
9.8x = 98
x = 98/9.8
x = 10
The mass of the rock is 10 kilograms
The mass of a rock falling from the sky if it hits the ground with a force of 98 N will be 9.89 Kg.
What is mass?
Mass is a numerical measure of inertia, which is a basic feature of all matter. It is, in effect, a body of matter's resistance to a change in speed or position caused by the application of a force.
The force is given as;
[tex]\rm F=mg \\\\ m = \frac{F}{g} \\\\ m = \frac{98}{9.81} \\\\ m = 9.989\ Kg[/tex]
Hence the mass of a rock falling from the sky if it hits the ground with a force of 98 N will be 9.89 Kg.
To learn more about the mass refer to the link;
https://brainly.com/question/13073862
