Question: 9. A construction worker accidently drops a hammer from a height of 90 m while working on the roof of a new apartment building. The

9. A construction worker accidently drops a hammer from a height of 90 m while working on the roof of a new apartment building. The height, s. in metres, of the hammer aftert seconds can be modelled by the function 50:):9049'52' t >0. a. Determine the velocity at 1 s and 4 s. {1 mark) b. When will the hammer hit the ground? {1 mark) c. Determine the impact velocity of the hammer. (1 mark)

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