Answer:
Mass, m = 16.02kg
Step-by-step explanation:
Given the following data;
Force, F = 157N
Since it's a free fall, acceleration, a = g = 9.8m/s² (acceleration due to gravity).
To find the mass;
Force is given by the multiplication of mass and acceleration.
Mathematically, Force is;
Where;
- F represents force measured in Newton.
- m represents the mass of an object measured in kilograms.
- a represents acceleration measured in meter per seconds square.
Making mass (m) the subject of formula, we have;
Substituting into the equation;

Mass, m = 16.02kg
Therefore, the mass of the rock is 16.02kg.