Shortcut Methods
Numerical Shortcuts :
- For Gravitational Force:
- Remember the formula -
- The value of G (gravitational constant) = 6.67×10-11 N·m2/kg2
- For Orbital Velocity:
- Remember that the orbital velocity is the velocity required by a satellite to remain in orbit around a planet or other celestial body.
- Use the value of G (6.67×10-11 N·m2/kg2) and substitute the masses and distances appropriately.
- Motion under Gravity:
- Remember the equation:
- For Maximum height:
- For Force acting
- For Maximum height:
-
Buoyant Force:
- Use the formula:
- ρ is the density of the fluid,
- g is the acceleration due to gravity and
- V is the volume of the object submerged in the fluid.
- Use the formula:
-
For Density, remember the formula:
- ρ = m/V
- ρ is the density,
- m is the mass, and
- V is the volume.
