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Inga [223]
3 years ago
13

An astronaut in an orbiting spacecraft attaches a mass m to a string and whirls it around in uniform circular motion. The radius

of the circle is r, the speed of the mass is v, and the tension in the string is F. If the mass, radius, and speed were all to double the tension required to maintain uniform circular motion would be
A) F/2
B) F
C) 2F
D) 4F
E) 8F
Physics
1 answer:
VikaD [51]3 years ago
8 0

Answer:

the correct ans is D.

Explanation:

as in case of uniform circular motion ,tension provides the necessary centripetal force ..and is given by :-

F = mv2/r

now if mass , speed and radius are doubled then putting the values in the formua we get ;

F' = (2m)(2v)2/ 2r

F' = 4(mv2/r)

F' = 4F

So, the correct option would be D.

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Answer:

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Explanation:

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3 years ago
What is a safe following distance between your automobile and the vehicle in front of you?
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4 0
3 years ago
jill's car has a maximum acceleration of 8.7 miles per hour per second. how many seconds does it take her to acceleration from 0
amm1812
T = ?
v1 = 0mph
v2 = 60mph
a = 8.7mph/s

a =  \frac{v2 - v1}{t}
 \\ t =  \frac{v2-v1}{a}
 \\ t =  \frac{60mph - 0mph}{8.7mph/s}
 \\ t = 6.90s

Therefore, it takes 6.90 seconds for Jill to accelerate from 0 to 60 miles per hour.
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Answer:

Explanation:

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