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3 years ago

How is friction reduced between an air hockey puck and the table.

Physics

1 answer:

iren2701 [21]3 years ago

6 0

Answer:

An air hockey table has a very smooth and slippery surface which reduces friction by suspending the puck on cushion of air, so that this its motion is much less altered by friction, causing it to glide in a straight line at relatively constant velocity across the table.

Explanation:

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An astronaut in a space craft looks out the window and sees an asteroid move pas a backward direction at 68 mph relative to the

Annette [7]

Answer: -194 mph

Explanation:

Taking into account the Sun as the center (origin, point zero) of the reference system, the velocity of the spacecraft relative to the Sun $V_{R-S}$ is:

$V_{R-S}=126mph$ Note it is positive because the spacecraft is moving away from the Sun

Taking into account the spacecraft as the center of another reference system, the velocity of the asteroid relative to the spacecraft $V_{A-R}$ is:

$V_{A-R}=-68mph$ Note it is negative because the asteroid is moving towards the spacracft.

Now, the velocity of the asteroid relative to the Sun $V_{A-S}$ is:

$V_{A-S}=V_{A-R}-V_{R-S}$

$V_{A-S}=-68mph-126mph$

Finally:

$V_{A-S}=-194mph$ This is the velocity of the asteroid relative to the Sun and its negative sign indicates it is moving towards the Sun.

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3 years ago

De acuerdo a la trayectoria que describe el movimiento de la

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Answer:

With a circle.

Explanation:

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