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nadya68 [22]
3 years ago
12

a sprinter's whose mass is 70 kg accelerstes from rest to 11 m/s in 6 seconds what is the acceleration what force did this requi

re
Physics
1 answer:
mr Goodwill [35]3 years ago
6 0
666666666666666666666666666666666666666666666666
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Describe the shapes and designs that are most aerodynamic.
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In a generator, as the magnet spins, opposite poles of the magnet push the electrons in opposite directions. This back-and-forth
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A horizontal clothesline is tied between 2 poles, 16 meters apart. When a mass of 3 kilograms is tied to the middle of the cloth
Alla [95]

Answer:

The magnitude of the tension on the ends of the clothesline is 41.85 N.

Explanation:

Given that,

Poles = 2

Distance = 16 m

Mass = 3 kg

Sags distance = 3 m

We need to calculate the angle made with vertical by mass

Using formula of angle

\tan\theta=\dfrac{8}{3}

\thta=\tan^{-1}\dfrac{8}{3}

\theta=69.44^{\circ}

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Using formula of tension

mg=2T\cos\theta

Put the value into the formula

3\times9.8=2T\times\cos69.44

T=\dfrac{3\times9.8}{2\times\cos69.44}

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4 years ago
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A conducting sphere has a net charge of -4.8x10-17 C. What is the approximate number of excess electrons on the sphere?
Aloiza [94]

Answer:

The number is  N  = 300

Explanation:

From the question we are told that

   The  net charge is  Q =  -4.8 *10^{-17 } \  C

Generally the charge on a electron is e = - 1.60 *10^{-19 } \ C

Generally the number of excess electrons is mathematically represented as

      N  =  \frac{Q}{e}

=>  N  =  \frac{-4.8 *10^{-17}}{-1.60 *10^{-19}}

=>  N  = 300

7 0
3 years ago
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