Two spherical objects have masses of 100 kg and 200 kg. Their centers are separated by a distance of 40 cm. Find the gravitational attraction between
them.

8.34 x 10⁻⁶N

Explanation:

Given parameters:

Mass 1  = 100kg

Mass 2 = 200kg

Distance of separation  = 40cm = 0.4m

Unknown:

Gravitational force of attraction between them  = ?

Solution:

To solve this problem, we use the expression below which is derived from the Newton's law of universal gravitation:

           Fg  =

G is the universal gravitation constant = 6.67 x 10⁻¹¹

d is the separation

 Now;

  Fg =   = 8.34 x 10⁻⁶N

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.