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anastassius [24]
2 years ago
15

II) A 0.40-kg ball, attached to the end of a horizontal ord, is rotated in a circle of radius 1.3 m on a friction- less horizont

al surface. If the cord will break when the tension in it exceeds 60 N, what i~ the maximum speed the ball can have
Physics
1 answer:
Lostsunrise [7]2 years ago
3 0

Hi there!

In this instance, the object spinning in a horizontal circle will experience a net force in the horizontal direction due to tension.

The net force is equivalent to the centripetal force, so:

∑F = T

mv²/r = T

Solve for v:

v = √rT/m

v = 13.96 m/s

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Answer:

you want to know newtons first law here.

Explanation:

An object that is at rest stays at rest or stays in motion.

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2 years ago
A 270,000 kg rocket in gravity -free space expels 270 kg of fuel by exerting a force of 360 N on it. Find the magnitude of the a
Brut [27]
F = m a 
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3 years ago
A nonconducting spherical shell, with an inner radius of 4 cm and an outer radius of 6 cm, has charge spread non uniformly throu
Aloiza [94]
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<span>dQ = ρ dV </span>

<span>Let dV be a spherical shell between between r and (r + dr): </span>
<span>dV = (4π/3)·( (r + dr)² - r³ ) </span>
<span>= (4π/3)·( r³ + 3·r²·dr + 3·r·(dr)² + /dr)³ - r³ ) </span>
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<span>drop higher order terms </span>
<span>= 4·π·r²·dr </span>

<span>To get total charge integrate over the whole volume of your object, i.e. </span>
<span>from ri to ra: </span>
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<span>= ∫ri→ra { (b/r)·4·π·r² } dr </span>
<span>= ∫ri→ra { 4·π·b·r } dr </span>
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<span>With given parameters: </span>
<span>Q = 2·π · 3µC/m²·( (6cm)² - (4cm)² ) </span>
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6 0
3 years ago
Diffusion occurs faster in gases than in liquids because _____.
jolli1 [7]
The correct answer to go in the blank would be A) The particles are moving faster.
5 0
3 years ago
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Answer: dakdadakdadakdadakda

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