7. The height of a helicopter above the ground is given by h =20.0 t-5.0 t where h is in meters andt 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 is90.0 mile/hour in a straight line in 10.0 s. Ball's acceleration is constant during the entiremotion, what is ball's final position?

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?

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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Question

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?

Expert Solution

Step 1

Hey there, since you have asked multiple questions. We have answered the first one for you. Please re-post the question and highlight the un-resolved one.

Given :

Height of the helicopter, h(t) = ( 20 t - 5 t² ) m

At t = 1s, height of the helicopter from ground is h(1) = ( 20(1) - 5(1)²)

h = 15 m

To determine the speed of the mailbox before hitting the ground and how long was the mailbox in air.

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Solved in 3 steps

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