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Doss [256]
3 years ago
8

Which is an example of sliding friction?

Physics
2 answers:
givi [52]3 years ago
6 0

The correct answer is C, applying brakes on a bike

Anvisha [2.4K]3 years ago
4 0
I think its D not sure
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What is the value of work done on an object when a 70–newton force moves it 9.0 meters in the same direction as the force?
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Answer:

630 J

Explanation:

W = Fdcosθ

W = 70(9)cos0

W = 630 J

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How does a pin hole camera work? And how do we see through them?
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What is the magnitude of your displacement when you follow directions that tell you to walk 225 m in one direction, make a 90° t
Gekata [30.6K]

Start by facing East. Your first displacement is the vector

<em>d</em>₁ = (225 m) <em>i</em>

Turning 90º to the left makes you face North, and walking 350 m in this direction gives the second displacement,

<em>d</em>₂ = (350 m) <em>j</em>

Turning 30º to the right would have you making an angle of 60º North of East, so that walking 125 m gives the third displacement,

<em>d</em>₃ = (125 m) (cos(60º) <em>i</em> + sin(60º) <em>j</em> )

<em>d</em>₃ ≈ (62.5 m) <em>i</em> + (108.25 m) <em>j</em>

The net displacement is

<em>d</em> = <em>d</em>₁ + <em>d</em>₂ + <em>d</em>₃

<em>d</em> ≈ (287.5 m) <em>i</em> + (458.25 m) <em>j</em>

and its magnitude is

|| <em>d</em> || = √[ (287.5 m)² + (458.25 m)² ] ≈ 540.973 m ≈ 541 m

7 0
3 years ago
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