3. the center of mass (or center of gravity) of a two-particle system is at the origin. one particle
is located at (3.0 m, 0.0 m) and has a mass of 2.0 kg. the other particle has a mass of 3.0 kg.
what is the location of the 3.0-kg particle?
a) (-3.0 m, 0.0 m)
b) (-2.0 m, 0.0 m)
c) (2.0 m, 0.0 m)
d) (3.0 m, 0.0 m)

B) (-2.0 m, 0.0 m)

Explanation:

Given:

Mass of particle 1 is,

Mass of particle 2 is,

Position of center of mass is,

Position of particle 1 is,

Position of particle 2 is,

We know that, the x-coordinate of center of mass of two particles is given as:

Plug in the values given.

We know that, the y-coordinate of center of mass of two particles is given as:

Plug in the values given.

Therefore, the position of particle 2 of mass 3.0 kg is  (-2.0 m, 0.0 m).

So, option (B) is correct.

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement