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natka813 [3]
3 years ago
7

A tracking station on Earth observes a rocket move away at 0.370c. This rocket is designed to launch a projectile at 0.505c rela

tive to the rocket. What speed (in terms of the speed of light) does the tracking station measure for the projectile if it is fired (a) straight ahead of the rocket or (b) backward from the rocket?
Physics
1 answer:
Orlov [11]3 years ago
7 0

Answer

given,

speed of rocket moving away = 0.370 c

speed of projectile = 0.505 c

a) Speed of the tracking station

  u = 0.505 c + 0.370 c = 0.875 c

 u'= \dfrac{u-v}{1-\dfrac{uv}{c^2}}

 u'= \dfrac{(0.875 c)-0.370 c}{1-0.875 \times 0.370}

        u' = 0.747 c

b)  when the rocket is moving backward

    u = -0.505 c + 0.37 c = - 0.135 c

 u'= \dfrac{-v}{1-\dfrac{uv}{c^2}}

 u'= \dfrac{(-0.135 c-0.370 c}{1-(-0.135) \times 0.370}

        u' = -0.481 c

negative sign represent direction

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A uniform meter rule with a mass of 200g is suspended at zero mark pivotes at 22.0cm mark. calculate the mass of the rule.
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Explanation:

Given;

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Total length of meter rule = 100 cm

0                          22cm                                  100cm

-------------------------Δ------------------------------------

↓                                                                       ↓

200g                                                                 m₂  

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