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Answer all the questions.
1 In space, Asteroid A, called Dimorphos travels at constant speed in a circle around a larger
Asteroid B, called Didymos. The diagram shows Asteroid A at position P.
Asteroid B
Didymos
Asteroid A
Dimorphos P
r0 = 1.19 km
The distance r0 between Asteroid A and Asteroid B is 1.19 km.
The time T0 for Asteroid A to travel once around Asteroid B is 4.29 × 104 s (11 hours 55 minutes).
(a) Calculate the average speed v, in m s–1, of Asteroid A.
v = ................................................. m s–1 [2]
(b) Explain one similarity and one difference between the velocity of Asteroid A at P and its velocity
six hours later.
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