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Question from Kinematics

A model rocket fired from the ground ascends with constant upward acceleration.
After 1.0 s from firing a small bolt is dropped from the rocket and after 5.0 s from firing, its fuel is then finished. The bolt strikes the ground after 2.0 s from the instant it was dropped. Acceleration due to gravity is g = 10 m/s2
(a) acceleration of the rocket while running on its fuel is 8.0 m/s2
(b) rocket was at height 100 m above the ground when its fuel was finished.
(c) maximum speed of the rocket during its flight is 40 m/s
(d) total airtime of the rocket is 15 s the question is how many statements are true?
Can u please explain in detail

Asked Jahnavi

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