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11-2 A rock with a diameter of 20 cm is dropped from a very high cliff. Using the 01pts drag-force equation F-(0.25) density11-3 A wrench of mass 1.5 kg is dropped from an airplane and falls toward earth 0.1 pts If the magnitude of the drag force on13-5 You are conducting an important physics experiment in the Cougar Eat by 01 pts tying a bagel to a string and twirling it13-4 A childs parent steps off a moving carousel at an amusement park. Which of 0.1 pts the paths shown below correctly descA

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Answer #1

Not sure about the first question. I think we need mass to find the terminal velocity and then time.

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11.3

Terminal velocity is when drag force = weight

0.004v2 = mg

v = sqrt ( mg / 0.004)

v = 60.6 m/s

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13.5

we know

Tension is the force in string

T = mv2 / r

so if T is now 2T, then

speed will be \sqrt{2} times as fast.

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13.4

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