3. “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.
4. What prevents a body from
attaining a velocity equal
to or exceeding the velocity
of light?
5. The mass of a body
is not a constant
quantity. But, as
the velocity
increases, the mass
of a body also
increases.
6. 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
7. 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.
8. 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.
