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kogti [31]
2 years ago
8

Scientists have organized all forms of energy into two types—kinetic and potential. Kinetic energy is the energy of motion, and

potential energy is stored energy.
Raise the pendulum again. Carefully watch the Energy Graph on the left. It shows the amount of energy the pendulum has as it moves.

At the top of its swing, does the pendulum have kinetic energy or potential energy?
PLEASE HELP!
Physics
1 answer:
mihalych1998 [28]2 years ago
7 0

Answer:

Potential energy only

Explanation:

at the top of its swing the pendulum stops moving , (therefore it has no KINETIC energy)  thus all of the energy is stored as potential energy.

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A wheel decelerates from 13.5 rad s−1 to 6.0 rad s−1 in 7 s. Calculate the angular displacement​
Igoryamba

Answer:

<em>Angular displacement=68.25 rad</em>

Explanation:

<u>Circular Motion</u>

If the angular speed varies from ωo to ωf in a time t, then the angular acceleration is given by:

\displaystyle \alpha=\frac{\omega_f-\omega_o}{t}

The angular displacement is given by:

\displaystyle \theta=\omega_o.t+\frac{\alpha.t^2}{2}

The wheel decelerates from ωo=13.5 rad/s to ωf=6 rad/s in t=7 s, thus:

\displaystyle \alpha=\frac{6-13.5}{7}

\displaystyle \alpha=\frac{-7.5}{7}

\displaystyle \alpha=-1.071 \ rad/s^2

Thus, the angular displacement is:

\displaystyle \theta=13.5*7+\frac{-1.071*7^2}{2}

\displaystyle \theta=94.5-26.25

\boxed{\displaystyle \theta=68.25\ rad}

Angular displacement=68.25 rad

3 0
3 years ago
A jet’s original velocity is 600 m/s. After 20 seconds accelerating at 8 m/s 2 , how
scoray [572]

Answer:

<h2>760 m/s</h2>

Explanation:

The jet's speed or final velocity can be found by using the formula

<h3>v = u + at</h3>

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From the question we have

v = 600 + 20(8)

= 600 + 160

We have the final answer as

<h3>760 m/s</h3>

Hope this helps you

3 0
3 years ago
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