7. The height of a helicopter above the ground is given by h =20.0 t-5.0 ť where h is in meters and t is in seconds. At t =1.00 s, the helicopter releases a small mailbag. a) What is speed of a mailbox before hint to the ground? b) How long mailbox in air?

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7. The height of a helicopter above the ground is given by h =20.0 t-5.0 t where h is in meters and
t is in seconds. At t=1.00 s, the helicopter releases a small mailbag.
a) What is speed of a mailbox before hint to the ground?
b) How long mailbox in air?
8. Starting from rest at 5 m from origin, a small still ball's horizontal component of velocity is
90.0 mile/hour in a straight line in 10.0 s. Ball's acceleration is constant during the entire
motion, what is ball's final position?
Transcribed Image Text:7. The height of a helicopter above the ground is given by h =20.0 t-5.0 t where h is in meters and t is in seconds. At t=1.00 s, the helicopter releases a small mailbag. a) What is speed of a mailbox before hint to the ground? b) How long mailbox in air? 8. Starting from rest at 5 m from origin, a small still ball's horizontal component of velocity is 90.0 mile/hour in a straight line in 10.0 s. Ball's acceleration is constant during the entire motion, what is ball's final position?
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