Version Quiz 2 PHY 211 General Physics Time: 30 Minutes No cellphone, iPad or co
ID: 1772817 • Letter: V
Question
Version Quiz 2 PHY 211 General Physics Time: 30 Minutes No cellphone, iPad or computer on table. No listening device attached to ears Name: Student ID [Choose the correct answer to the following questions) Score:- A small ball rolls horizontally off the edge of a cliff that is 4.9 m high. It strikes the floor at a point 4.9 m horizontally from the cliff edge. The ball was in the air for a. 0.5s b. 0.7 s c. 1s d. 1.41s e. 2s 2. An object is moving on a circular path of radius of meter at a constant speed of 1 m/s. Its period is a.2 s c.2/2 d./3 e.2/4 s s s 3. An object is moving at a constant rate in a horizontal circular path of radius 1 m. If the rad acceleration of the object is 25 m/s2, its speed is a. 625 m/s b. 25 m/s c. 10 m/s d. 5 m/s e. 1 m/s The object in the previous problem 3 has a period of a. 0.8 s b. 1.26 s c. 0.25 s d. 1 s e. None of the above 4. Page 1 of 4 Version A Quiz 2 PHY 211Explanation / Answer
(1)s = 0.5gt^2
t^2=2s/g
=2*4.9/9.8
=1
t = 1s
Option (c)
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