Books by Author Lovekush Kumar
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Recent Articles
What happen to angular momentum when a child sits on a rotating platform ?
No change in angular momentum(J).
What will be the moment of Inertia (MoI) if the axis of rotation is passing through the mid point between two masses ?
Draw a diagram and solve.
What if the axis of rotation(AoR) is passing through one of the masses ?
Contribution of the mass falling on AoR will be zero.
What if the axis of rotation is passing through the masses ?
Moment of inertia about that axis of rotation (AOR) will be zero.
Deriving the expression for ratio of speeds after inelastic collision of two similar objects one moving and one at rest.
Restitution coefficient e has value 1 for elsatic collision.
In elastic collsion the total energy remains constant.
Restitution coefficient is the ratio of relative speed of separation after collsion to the relative speed of approach before collision.
Two rotating bodies have same kinetic energy but different moment of inertia, find the ratio of their angular momentum.
Note the following notations:
J - angular momentum
K.E.- kinetic energy
I- moment of inertia (MoI)
omega represents angular speed.
1 & 2 are for two cases.(situations)
Impact on path of the center of mass of a bomb when exploded in air ?
No impact as no "external" force.
Finding acceleration of center of mass of two masses.
what we need to solve the problem, is value of two masses and their respective acceleration.
Finding velocity of center of mass in vector form for a system of two masses.
What we need to solve the problem is the respective values of velocities alongwith value of mass.
As mass appeares in numerator and denominator so converting it into kg is not required.
