Question

In our usual coordinate system( +x to the right, +y up (away from the center of the Earth), +z out of the page toward you), what is the vector gravitational force on a 31 kg object sitting on the ground? (From the momentum principle you can conclude that a force of the same magnitude is exerted upward by the ground on the object if the momentum isn't changing. In Chapter 4 we'll see more about the origin of this force.)

Answer 1

The vector gravitational force is
`W = 303.8\ N( -y)`

Step-by-step explanation:

From the question we are told that

The mass of the object is
`m = 31 \ kg`

The acceleration due to gravity experienced by the object is
`g = 9.8 m/s^2`

Generally the vector gravitational force on the object is mathematically represented as

`W = 31 * 9.8`

`W = 303.8\ N (-y)`

The -y indicates that the direction of the force is towards the center of the earth