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3 years ago

A stone is dropped from a cliff. after it has fallen 10m what is the stones velocity

Physics

2 answers:

Hatshy [7]3 years ago

6 0

Answer:

V=14,1421 m/s

Explanation:

it's simple.

Velocity increases with the gravity acceleration.

There's a formula called Torricelli's equation, and it is as it follows:

V^2 = Vo^2 +2.a.s

where V is the speed you wish to find

Vo is the initial speed

a is the acceleration, in this case, the gravity's one

s is the space it moved.

So, here we go

Vo=0

a=10 or 9.81 (some schools use 10 to simplify the math)

s=10

So, using g as 10

V^2 = 0 +2.10.10

V^2=200

V=14,1421 m/s

Ludmilka [50]3 years ago

3 0

The answer is 14,1421 m/s. :)

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2 years ago

Read 2 more answers

A wire 3.22 m long and 7.32 mm in diameter has a resistance of 11.9 mΩ. A potential difference of 33.7 V is applied between the

Scorpion4ik [409]

Answer:

(a) Current is 2831.93 A

(b) $8.40A/m^2$

Explanation:

Length of wire l = 3.22 m

Diameter of wire d = 7.32 mm = 0.00732 m

Cross sectional area of wire

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Resistance $R=11.9mohm=11.9\times 10^{-3}ohm$

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(B) Current density is equal to

$J=\frac{i}{A}$

$J=\frac{2831.93}{4.20\times 10^{-5}}=8.40A/m^2$

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Hope i helped u...

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