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Monica [59]
3 years ago
5

A snowboard has a mass of 1.53 kg. What is the static frictional force on the snowboard if the

Physics
1 answer:
Zigmanuir [339]3 years ago
5 0

Answer:

Static friction, F=2.9988 N

Explanation:

Static Friction: It is the friction between two or more solid body that are not moving relative to each other.

              When an external force is applied to a body that is in contact with another body, static friction opposes the applied force upto a certain limit, keeping the body at rest. When the applied force exceeds the certain limit the  body begins to move. At that moment applied force is equal to limiting value of  static friction F.

                It varies linearly with normal force(N)

                       F∝N

                         F=μN   (where μ is constant of proportionality and known as coefficient of static friction)

Now,

Mass, m=1.53 kg

Coefficient of static friction, μ=0.2

Normal force, N=m×g

                        =1.53\times9.8     (g=9.8 m/s²)

                         =14.994 N  

Static friction, F= μN  

                         =0.2\times14.994

                          = 2.9988 N                                      

   

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4 years ago
Suppose that you are swimming in a river while a friend watches from the shore. In calm water, you swim at a speed of 1.25 m/s .
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Answer: The observing friend will the swimmer moving at a speed of 0.25 m/s.

Explanation:

  • Let <em>S</em> be the speed of the swimmer, given as 1.25 m/s
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  • Note that this speed is the magnitude of the velocity which is a vector quantity.
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Hence the resultant velocity is given as, S_{R} = S — S 0S_{0}

S_{R} = 1.25 — 1

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What is the wavelength, in nm, of the line in the hydrogen spectrum when one n value is 3 and the other n value is 6?
iren [92.7K]

Answer:

\lambda=1090nm

Explanation:

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3 years ago
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