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svetlana [45]
3 years ago
5

A 65 kg student climbs 7 m up a rope at a constant speed. If the students power to output is 300 w, how long does it take the st

udent to climb the rope
Physics
1 answer:
tino4ka555 [31]3 years ago
3 0

g≈10 m/s²

F=G=mg=65*10=650 N

L=F*h=650*7=4550 J

P=L/t=>t=L/P=4550/300=15.16 s


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AlekseyPX

Answer:

v = \sqrt{2gh + \frac{2\mu_kgh}{tan\theta}}

Explanation:

When we push the box from the bottom of the incline towards the top then by work energy theorem we can say that

Work done by all the forces = change in kinetic energy of the system

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here we know that

F_f = \mu_k mg cos\theta

also we know that the length of the incline is given as

s = \frac{h}{sin\theta}

now we have

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3 0
3 years ago
Two objects separated by a distance r are each carrying a charge q The magnitude of the force exerted on the second object by th
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Force between the two charges is given by

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if one charge become 4 times, new force is,

F=4(K*q1*q2)/r^2

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Dmitriy789 [7]

Greenhouse gases trap thermal energy and reflect the sun’s harmful radiation back to Earth is the answer

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hodyreva [135]

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