Answer:
D. 196 N
Step-by-step explanation:
The force of gravity acting on an object located at the Earth's surface is given by:

where
m is the mass of the object
g is the acceleration due to gravity
In this problem:
- m=20 kg is the mass of the object
- g = 9.81 m/s^2 is the acceleration due to gravity at Earth's surface
Substituting these data into the formula, we get
