An Object with a Rest Mass of 0

Multiple Choice

An object with a rest mass of 0.456-kg is moving at 1.20 × 10⁸ m/s.What is the magnitude of its momentum? (c = 3.00 × 10⁸ m/s)

A) 5.47 × 10⁷ kg ∙ m/s
B) 5.57 × 10⁷ kg ∙ m/s
C) 5.67 × 10⁷ kg ∙ m/s
D) 5.87 × 10⁷ kg ∙ m/s
E) 5.97 × 10⁷ kg ∙ m/s