An Object Moving with a Constant Velocity of 0 $2.78 \times 10 ^ { - 27 } \mathrm {~kg}$

Multiple Choice

An object moving with a constant velocity of 0.80 c has a mass of $2.78 \times 10 ^ { - 27 } \mathrm {~kg}$ . The rest mass of the object is

A) $3.87 \times 10 ^ { - 27 } \mathrm {~kg}$
B) $2.78 \times 10 ^ { - 27 } \mathrm {~kg}$
C) $1.67 \times 10 ^ { - 27 } \mathrm {~kg}$
D) $0.67 \times 10 ^ { - 27 } \mathrm {~kg}$