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3 votes
Accepted

Is the answer given in the option wrong?

The answer sheet is correct. You are ignoring the statement “The direction of the motion of the object changed only once, at time t.” That means that the velocity was zero at time t. So before time t ...
Dale's user avatar
  • 103k
1 vote

Doppler shift from a moving reflector and source if only the relative velocity is known?

can we determine the relative velocity with doppler effect? Yes we can. This is similar to the principle that that police speed radar works on, except that the police radar uses electromagnetic waves....
KDP's user avatar
  • 5,768
1 vote
Accepted

How to properly combine kinetic and gravitational time dilation effect?

Simply multiply the gravitional time dilation with the kinematic time dilation for both the earth and the GPS and then divide the earth's total by the GPS's. Of course on the poles the v on the ...
Yukterez's user avatar
  • 12.4k

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