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-- 8. Two car of masses m1 and m2 are moving in circles of radii r1 and r2 respectively. Their speeds are such that they make complete circle in the same time t. The ratio of their centripetal acceleration is
A
m1r1 : m2r2
B
m1 : m2
C
r1 : r2
D
1 : 1
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-- 7. In uniform circular motion, the centripetal acceleration has

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