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sveticcg [70]
3 years ago
10

Pls help I really need help w this one Tnks

Physics
1 answer:
lyudmila [28]3 years ago
6 0
Sorry I do not know srry
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Ángel is riding his bike 15m/h south a) speed b) velocity c) acceleration​
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Velocity

Explanation:

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You drop a stone down off a bridge. You are able to count to 4.0 seconds when it finally hits the water. How high is the bridge?
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Answer:

The height of the bridge is 78.4 m.

Explanation:

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h = ut + ¹/₂gt²

where;

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3 years ago
A ball is whirled on the end of a string in a horizontal circle of radius R at constant speed v. Complete the following statemen
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Answer:

Keeping the speed fixed and decreasing the radius by a factor of 4

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A ball is whirled on the end of a string in a horizontal circle of radius R at constant speed v. The centripetal acceleration is given by :

a=\dfrac{v^2}{R}

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a'=\dfrac{v^2}{R'}

a'=\dfrac{v^2}{R/4}

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a'=4\times a

So, the centripetal acceleration of the ball can be increased by a factor of 4.

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3 years ago
What did copernicus say about the motion of the sun?.
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the sun was stationary in the center of the universe and the earth revolved around it....

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