Question

What is the approximate weight of a 20-kg cannonball on earth

Answer 1

20 times 9.8 = 196 N

Answer 2

196 N

Step-by-step explanation:

The weight of an object is given by

`W=mg`

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:

`W=mg=(20 kg)(9.8 m/s^2)=196 N`