Multiple Choice
A spear is thrown by you at a very high speed.As it passes,you measure its length at 1/2 its normal length.From this you conclude that the moving spear's mass must be
A) one-half its rest mass.
B) twice its rest mass.
C) four times its rest mass.
D) None of these choices are correct.
Correct Answer:
Verified
Correct Answer:
Verified
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