2 years ago

What is the Kinetic Energy of a 60 kg person on skis traveling 20 m/s?

Physics

1 answer:

sattari [20]2 years ago

3 0

Explanation:

equating the parameters into the formula, it's gonna be

= ½ × 60 × 20²

= ½ × 60 × 400

= ½ × 24000

K.E = 12000J

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joja [24]

As it is given that the air bag deploy in time

$t = 10 ms = 0.010 s$

total distance moved by the front face of the bag

$d = 20 cm = 0.20 m$

Now we will use kinematics to find the acceleration

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$0.20 = 0 + \frac{1}{2}a*0.010^2$

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now as we know that

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2 years ago

What kind of energy do most electric inventions give off?

krek1111 [17]

Answer:

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Explanation:

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2 years ago

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elixir [45]

Answer:

The observer sees the space-probe 9.055m long.

Explanation:

Let $L_0$ be the length of the space-probe when measured at rest, and $L$ be its length as observed by an observer moving at velocity $v$ , then

$(1).\: \: L = L_0\sqrt{1-\dfrac{v^2}{c^2} }$

Now, we know that $L_0 = 29.0m$ and $v = 0.95c$ , and putting these into $(1)$ we get:

$L = 29\sqrt{1-\dfrac{(0.95c)^2}{c^2} }$

$L = 29\sqrt{1-0.95^2 }$

$\boxed{L = 9.055m}$

Thus, an observer moving at 0.95c observes the space-probe to be 9.055m long.

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3 years ago

The combustion of ethanol, C2H5OH(l), in oxygen to form carbon dioxide gas and water vapor is shown by which balanced chemical e

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2 years ago

A 12.0-kilogram object is lifted from the ground to a height of 4.00 meters.

kow [346]

Answer:

3 j

Explanation:

12.0 kilo / 4.00 meters = 3 j

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2 years ago