Answer:
Centre of mass is the point at which the distribution of mass is equal in all directions, and does not depend on gravitational field. Centre of gravity is the point at which the distribution of weight is equal in all directions, and does depend on gravitational field.
Answer:
Gravity, or gravitation, is a natural phenomenon by which all things with mass or energy-including planets,stars,galaxies, and even light-are brought toward one another.
Explanation:
Impermeable is a substance that is water proofed e.g glass, aluminium e.t.c <span />
A cord is wrapped around the outer surface of the 8-kg disk. If a force of F = (1⁄4θ²) N, where θ is in radians, is applied to the cord, determine the disk’s angular acceleration when it has turned 5 revolutions. The disc has an initial angular velocity
and radius from the center of the disc = 300 mm
Answer:
the angular acceleration = 205.706 rad/sec²
Explanation:
GIVEN THAT:
The disc mass = 8 kg
Force = 
We are told that the given θ is in radians; Therefore; the when it has turned 5 revolutions; we have the θ to be:

Also;
the initial angular velocity
radius from the center of the disc = 300 mm = 0.3 m
Thus; the mass moment about the Inertia can be determined via the following expression;



Now to calculate the angular acceleration; we equate the sum of the moments acting on the Inertia;
SO:






Hence; the angular acceleration = 205.706 rad/sec²