Consider a spaceship that moves toward you at half the speed of light.It fires a probe toward you,relative to itself,at 0.7 the speed of light.Relative to you,the probe approaches at about
A)70% c.
B)87% c.
C)89% c.
D)92% c.
E)96% c.

Question

Quizplus · Accepted Answer

The relativistic velocity addition formula is used here: v = (v1 + v2) / (1 + v1*v2/c^2). Plugging in v1 = 0.5c and v2 = 0.7c, we get v ≈ 0.89c.

Consider a Spaceship That Moves Toward You at Half the Speed