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3 years ago

How does kinetic energy potential energy, and friction affect a skate track design??

Physics

1 answer:

svlad2 [7]3 years ago

6 0

The friction of the skate board and turns make it harder to go fast, so thats why it needs to be simple yet flat-ish

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URGENT!!!!!!!<br><br> PLEASE HELP WITH THIS PHYSICS PROBLEM

Levart [38]

Explanation:

Let

$x_1$ = distance traveled while accelerating

$x_2$ = distance traveled while decelerating

The distance traveled while accelerating is given by

$x_1 = v_0t + \frac{1}{2}at^2 = \frac{1}{2}at^2$

$\:\:\:\:\:= \frac{1}{2}(2.5\:\text{m/s}^2)(30\:\text{s})^2$

$\:\:\:\:\:= 1125\:\text{m}$

We need the velocity of the rocket after 30 seconds and we can calculate it as follows:

$v = at = (2.5\:\text{m/s}^2)(30\:\text{s}) = 75\:\text{m/s}$

This will be the initial velocity when start calculating for the distance it traveled while decelerating.

$v^2 = v_0^2 + 2ax_2$

$0 = (75\:\text{m/s})^2 + 2(-0.65\:\text{m/s}^2)x_2$

Solving for $x_2,$ we get

$x_2 = \dfrac{(75\:\text{m/s})^2}{2(0.65\:\text{m/s}^2)}$

$\:\:\:\:\:= 4327\:\text{m}$

Therefore, the total distance x is

$x = x_1 + x_2 = 1125\:\text{m} + 4327\:\text{m}$

$\:\:\:\:= 5452\:\text{m}$

3 0

3 years ago

A temperature of 20°C is equal to ? °F.

Papessa [141]

The answer is 68 F. i hope this helps

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4 years ago

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What kind of change is it when a liquid turns into a gas by boiling????????????????????

elixir [45]

It is called vaporization. Vaporization is the phase transition from a liquid to a gas by means of evaporation or boiling. Evaporation occurs at temps below the boiling point and occurs on the liquids surface. Boiling is a rapid vaporization that occurs above the boiling temp and below or at the liquids surface.

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4 years ago

Please answer these few questions. This is supposed to be a science question but I had to put it as physics.

Kaylis [27]

I don’t understand how I’m supposed to answer that if you have to watch a video and answer certain questions on certain pages which we don’t have

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3 years ago

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(EARTH SPACE SCIENCE QUESTION)

Sergeeva-Olga [200]

*may be egg shaped

*has no new stars being formed