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Darina [25.2K]
2 years ago
7

I will give brainliest to whoever answers this in less than 10 minutes.

Physics
1 answer:
Ipatiy [6.2K]2 years ago
8 0

Answer:

D) No, because of the way work is defined

Explanation:

There is no motion in the direction of the force, then no work is done by that force. ... But the work done on the box is zero since by moving in a straight line at constant speed, its energy is remaining the same.

Hope it helps

Please mark me as the brainliest

Thank you

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8 0
2 years ago
The lowest note on a grand piano has a frequency of 27.5 Hz. The entire string is 2.00 m long and has a mass of 440g . The vibra
ANEK [815]

Answer:

Tension, T = 2038.09 N

Explanation:

Given that,

Frequency of the lowest note on a grand piano, f = 27.5 Hz

Length of the string, l = 2 m

Mass of the string, m = 440 g = 0.44 kg

Length of the vibrating section of the string is, L = 1.75 m

The frequency of the vibrating string in terms of tension is given by :

f=\dfrac{1}{2L}\sqrt{\dfrac{T}{\mu}}

\mu=\dfrac{m}{l}

\mu=\dfrac{0.44}{2}=0.22\ kg/m

T=4L^2f\mu

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So, the tension in the string is 2038.09 N. Hence, this is the required solution.

6 0
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