Question: What is the dimensional formula of gravitational constant (G)?
- [M]^-1 [L]^3 [T]^-2
- [M] [L]^3 [T]^-2
- [M]^-1 [L]^2 [T]^-1
- [M] [L] [T]^-1
Answer: A) [M]^-1 [L]^3 [T]^-2
Dimensional Formula of Gravitational ConstantSolution:
The dimensional formula of the gravitational constant, denoted as “G,” is an essential parameter in physics, used to describe the strength of the gravitational force between two objects.
Here’s a breakdown of the dimensions used in this formula:
- [M] represents mass, which is measured in kilograms (kg).
- [L] stands for length, which is typically measured in meters (m).
- [T] denotes time, measured in seconds (s).
The formula [M]^-1 [L]^3 [T]^-2 signifies that the gravitational constant has units of kilograms to the power of negative one, meters cubed, per second squared. This dimensional formula allows scientists and engineers to incorporate G into various equations, such as Newton’s law of universal gravitation, which relates the gravitational force between two objects to their masses and the distance between them. Understanding the dimensional formula of G is fundamental to making accurate calculations in gravitational physics.
What is Velocity Class 9
Velocity is a vector quantity that refers to the speed of an object in a specific direction. Class 9 physics defines velocity as the displacement of an object per unit of time. It is different from speed, which only measures how fast an object moves. Velocity considers both magnitude (how fast) and direction. The formula for velocity is:
Velocity =
In Class 9, students learn that velocity can be positive or negative based on the direction of motion. Understanding “What is velocity” helps in solving problems related to motion and kinematics.
