Answer:
196 N
Explanation:
The weight of an object is given by
[tex]W=mg[/tex]
where m is the mass of the object, and g is the gravitational acceleration on the planet.
In this example, we have an object with mass m=20 kg, and the value of the acceleration due to gravity on Earth is g=9.81 m/s^2, therefore if we use the above equation we find the weight of the cannonball:
[tex]W=mg=(20 kg)(9.8 m/s^2)=196 N[/tex]
