A feather is dropped on the moon from a height of 1.4 meters. The acceleration of gravity on the moon is 1.67 m/s^2. Calculate time for the feather to fall to the surface of the moon.

Question

Valentin Foster

Physics

7 September, 04:30

A feather is dropped on the moon from a height of 1.4 meters. The acceleration of gravity on the moon is 1.67 m/s^2. Calculate time for the feather to fall to the surface of the moon.

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Answers (1)

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Leslie Fernandez · Answer 1

The initial velocity of feather=0

By equation

v^2 = u^2+2as

v^2=0 + 2 (1.67) (1.4)

v^2=4.67

v=√4.67

v=2.16m/s

Now we have final velocity when feather touches the surface of moon.

Using the equation

v=u + at

2.16 = 0+1.67t

t=2.16/1.67

t=1.3sec