(a) According to Dina, how fast is the ball moving? c (b) According to Dina, wha

Question

(a) According to Dina, how fast is the ball moving?
c

(b) According to Dina, what time interval is required for the ball to reach her?
s

(c) According to Ed, how far apart are Owen and Dina?
m

(d) According to Ed, how fast is the ball moving?
c

Owen and Dina are at rest in frame S', which is moving with a speed of v1 = 0.630c with respect to frame S. They play a game of catch while Ed, at rest in frame S, watches the action (see figure below). Owen throws the ball to Dina with a speed of v2 = 0.750c (according to Owen) and their separation (measured in S') is equal to d = 1.85 Owen and Dina are at rest in frame S', which is mo (a) According to Dina, how fast is the ball moving? c (b) According to Dina, what time interval is required for the ball to reach her? s (c) According to Ed, how far apart are Owen and Dina? m (d) According to Ed, how fast is the ball moving? c Owen and Dina are at rest in frame S', which is mo 1012 m.

Explanation / Answer

a)

-0.75 c towards dina

b)

dt = 1.85*10^12/0.75*3*10^8 = 8222.22 s

c)

dx = sqrt(1 -0.63^2) *1.85*10^12 = 1.4367 *10^12 m

d)

(-0.75 + 0.63)/(1 + -0.75*0.63) = -0.2275 c

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