mass variation (2)

MASS VARIATI

ON

According to Newton's second law of motion,

F = maFORCE

MASS ACCELERATION

“If a constant force 'F' is applied to a body for a very long interval of

time, the velocity of the body will go on increasing due to the

acceleration produced in the body.”

This velocity may become equal to, or even exceed the velocity of

light, assuming that mass remains constant.

What prevents a body from attaining a

velocity equal to or exceeding the velocity

of light?

The mass of a body is not a

constant quantity. But, as

the velocity increases, the mass of a body also increases.

As the velocity increases, force will less and less acceleration.

When the velocity of a body becomes equal to the velocity of

light, the mass of the body becomes infinite. Consequently,

the force will be unable to produce any further acceleration

in the body.

Einstein's Relativity Video

The mass of a body moving with a velocity 'v', relative to the observer, is given by

Where m0 is the rest mass of the body i.e., the mass of the body when it is at rest with respect to the observer.

The mass of a body in a moving frame, as measured by an

observer in a stationary frame, is always greater than the rest mass m0 of

the body.