a- depends on the mass
b- corresponds to a KE equal to its rest energy
c- is the speed of sound
d- is the speed of light
2007-01-30 15:59:38 · 6 answers · asked by Tami B 1 in Science & Mathematics ➔ Physics
the upper limit to anything with or without mass is (d)
if you look at the expression for variation of mass with speed in relativity
u will see that as the object moves faster its mass tends to increase and at the speed of light the mass is INFINITY
this is not a practical case
the explanation is when u try to speed up an object the energy supplied starts to increase its mass rather than speed
so the mass increase not speed hence no body with mass can go with the speed of light though theoritically possible
2007-01-30 16:21:50 · answer #1 · answered by photon 2 · 0⤊ 0⤋
For an object to achieve the speed of light would take an infinite amount of energy.
This comes from: m(moving mass) = m(rest mass)/ sqrt(1-v^2/c^2) As v increases, the quantity v^2/c^2 approaches 1 which means sqrt(1-v^2/c^2) approaches 0 and moving mass increases without bound (infinity).
2007-01-30 16:13:23 · answer #2 · answered by smartprimate 3 · 1⤊ 0⤋
The limit is the speed of light. However, an object with mass can never reach the speed of light. Its mass increases with the speed, m = static m * sqrt (1 - v^2/c^2). For v = c (the speed of light), the mass would be infinite, and the energy too, as E = m * c^2
2007-01-30 19:16:51 · answer #3 · answered by Ioana 2 · 0⤊ 1⤋
d nothing with mass can achieve the speed of light except in hollywood
2007-01-30 16:06:05 · answer #4 · answered by crackleboy 4 · 0⤊ 0⤋
d. 299,792,458 metres per second.
2007-01-30 16:05:04 · answer #5 · answered by CLICKHEREx 5 · 0⤊ 0⤋
d, in theory
2007-01-30 16:03:51 · answer #6 · answered by justr 3 · 0⤊ 0⤋