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3 years ago

6

An acorn falls from a tree. Its velocity just before it hits the ground is 28.2 m/s, downward. (acceleration of gravity is 9.81m

/s2). what is the acorn velocity at 1.4 s?

1 answer:

ss7ja [257]3 years ago

7 0

Answer:

12.74 ms^-1 download

Explanation:

v=28.2, a=9.81

start from rest u=0

v=u+at=0+(9.81)t=28.2

t=2.875...

it reach 1.4 second before hitting the ground:

t=1.4, u=0, a=9.81

v=u+at=0+(9.81)(1.4)=12.74

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Nutka1998 [239]

Answer:

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Explanation:

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3 years ago

The propeller of a World War II fighter plane is 2.30 m in diameter. (a) What is its angular velocity in radians per second if i

Sergio [31]

Answer with Explanation:

We are given that

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Radius= $r=\frac{d}{2}=\frac{2.3}{2}=1.15 m$

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Frequency= $\frac{1200}{60}=20 Hz$

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nalin [4]

Answer:

there yah go that's the answer

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