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Harman [31]
3 years ago
6

Explain the value or importance of using the international system of units when describing motion

Physics
1 answer:
adoni [48]3 years ago
5 0
<span>It is important to use the Système Internationale (SI) units to describe motion, and other scientific concepts, firstly because the units are the most widely used. Unit choice is largely arbitrary, however, because many scientific units are derived from the base SI units, for example, the Newton is kg m s-2. Thus, secondly, more complex units are based on the bedrock of the SI units.</span>
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The radius of the earth's very nearly circular orbit around the sun is 1.5 1011 m. find the magnitude of the earth's velocity, a
kotykmax [81]
The radius of Earth's circular trajectory is
R=1.5*10^{11} m
The time for the Earth to travel around the Sun is
t=365(days)*24(hours)*3600(seconds) =3.1536*10^7 (s)
Thus the velocity is velocity
v=2\pi R/t =2\pi *1.5*10^{11}/(3.1536*10^{7})=2.99*10^4 (m/s)
From this we can deduce the centripetal acceleration
a=v^2/R =(2.99*10^4)^2/(1.5*10^{11}) =5.96*10^{-3}  (m/s^2)
Angular velocity is
\omega =v/R =(2.99*10^4)/(1.5*10^{11})=2*10^{-7} (rad/s)

5 0
3 years ago
1. Stored energy or energy due to position is known as ____________________ energy
Sliva [168]

Answer:

Potential energy

Explanation:

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5 0
2 years ago
Read 2 more answers
A 100-kg merry-go-round in the shape of a uniform, solid, horizontal disk of radius 1.50 m is set in motion by wrapping a rope a
olchik [2.2K]

Answer:

The force required is equal to 30\pi N.

Explanation:

We know that

     Torque = force × perpendicular distance

                  = F × R = I×\alpha

               I = M×\frac{R^{2} }{2}

  From above equation \alpha  = \frac{FR}{I}              .............. 1

      We know that

              w=w_{o} +\alpha t                      ...........................2

               Given that t= 2 sec

                                  w_{o} = 0

                                  w=0.4 rev/s = 0.8\pi rad/s

From equation 1 and 2 , we get

                  F =  \frac{wI}{RT}  =  \frac{w\times m \times r}{2t}

    Upon substituting the above values we will be getting

          F = 30\pi N

                   

3 0
3 years ago
Which of these describes Kepler’s third law of orbital motion?(1 point)
Nadusha1986 [10]

Answer:

T2 ∝ a3

Explanation: took the quick check

4 0
1 year ago
Which of the following is a true statement about work?
Over [174]

Answer:

It measure the effort it takes for an object to move

Explanation:

Work done is the force applied to move a body through a particular distance.

It can also to be said to be a measure of the effort it takes for an object to move.

The unit of work done is in Joules.

 To find work done, we use the expression below:

       Work done  = Force x distance

5 0
3 years ago
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