Eamcet Physics - 1 st Year : Unit 2.2( Kinematics ) - Motion Under Gravity Free Online Tests | Mock Tests | Preparation | Practice Tests

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Eamcet Physics
1 st Year : Unit 2.2( Kinematics ) - Motion Under Gravity

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Water drops fall from the roof of a building 20m high at regular time i intervals. If the first drop strikes the floor when the sixth drop begins to fall, the heights of the second and fourth drops from the ground at that instant are (g=10ms^–2)

A. 12.8 m and 3.2 m

B. 12.8 m and 7.2 m

C. 19.2 m and 0.8 m

D. 7.2 m and 16.8 m

E. None of the above

View Answer

Correct choice: D

Explanation:

Ans : 5 drops are in motion
9 x + 7x + 5x + 3x + x = 20

h2nd = 9x = 7.2m
h4th = 21x = 16.8m

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Eamcet Physics 1 st Year : Unit 2.2( Kinematics ) - Motion Under Gravity

Eamcet Physics
1 st Year : Unit 2.2( Kinematics ) - Motion Under Gravity