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anzhelika [568]
3 years ago
5

An apple falls out of a tree and takes 1.75 seconds to strike the ground.what was the velocity of the apple when it hit the grou

nd
Physics
2 answers:
goblinko [34]3 years ago
5 0
Assuming acceleration is 10
let the final velocity be x
(x-0) /1.75= 10 where 0 is initial velocity at its highest point
x= 17.5m/s
ioda3 years ago
3 0

Answer:

v_f=17.15\frac{m}{s}

Explanation:

The apple is in free fall, therefore we can use the kinematic equations, especifically the which one that relate final speed to acceleration of gravity and time:

g=\frac{v_f-v_o}{t}

The initial speed is zero, since falls out of the tree and recall that g=9.8\frac{m}{s^2}. So, Rewriting for final speed:

v_f=gt\\v_f=(9.8\frac{m}{s^2})(1.75s)\\v_f=17.15\frac{m}{s}

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Light of wavelength 500 nm is incident perpendicularly from air on a film 10-4cm thick and of refractive index 1.375. Part of th
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Answer

given,

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b) phase difference is equal to

Reflection from the first surface has a 180° (½λ) phase change.

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The unit of energy is a derived unit why​
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Answer:

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Explanation:

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