Gravitational force
In nature, every object is attracted by every other object. This phenomenon is called gravity. The force associated with gravity is called gravitational force. The gravitational force is the weakest force that exists in nature. The gravitational force is always attractive.
Acceleration Due to Gravity
In fundamental physics, gravity or gravitational force is the universal attractive force acting between all the matters that exist or exhibit. It is the weakest known force. Therefore no internal changes in an object occurs due to this force. On the other hand, it has control over the trajectories of bodies in the solar system and in the universe due to its vast scope and universal action. The free fall of objects on Earth and the motions of celestial bodies, according to Newton, are both determined by the same force. It was Newton who put forward that the moon is held by a strong attractive force exerted by the Earth which makes it revolve in a straight line. He was sure that this force is similar to the downward force which Earth exerts on all the objects on it.
![### Chapter 13, Problem 037 GO
**Your answer is partially correct. Try again.**
The three spheres in the figure, with masses \( m_A = 73 \, \text{g} \), \( m_B = 8 \, \text{g} \), and \( m_C = 20 \, \text{g} \), have their centers on a common line, with \( L = 20 \, \text{cm} \) and \( d = 4 \, \text{cm} \). You move sphere \( B \) along the line until its center-to-center separation from \( C \) is \( d = 4 \, \text{cm} \). How much work is done on sphere \( B \) (a) by you and (b) by the net gravitational force on \( B \) due to spheres \( A \) and \( C \)?
#### Diagram Explanation:
The diagram shows three spheres labeled A, B, and C aligned horizontally in the following manner:
- Sphere \( A \) on the left.
- Sphere \( B \) in the center.
- Sphere \( C \) on the right.
The distances between the spheres are indicated:
- Distance \( L \) between A and C.
- Distance \( d \) between A and B as well as between B and C.
The goal is to determine the work done in moving sphere \( B \) and calculate the net gravitational force exerted on sphere \( B \) by spheres \( A \) and \( C \).
#### Input Fields
- (a) Number: \(\boxed{-5.306}\) Units: \(\text{[Dropdown menu selectable unit]}\)
- (b) Number: \(\boxed{-5.306}\) Units: \(\text{[Dropdown menu selectable unit]}\)
Below the input fields, there's a clickable option:
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