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pogonyaev
3 years ago
5

Some runners have just started a race. They began at rest and are getting faster.What statement best describes the motion of the

runners at the beginning of the race (right after they start running)?
A. Acceleration and speed both remain constant.
B. Velocity and speed both remain constant.
C. Acceleration is positive and speed is increasing.
D. Velocity remains the same and speed is positive
Physics
1 answer:
olasank [31]3 years ago
8 0

Answer:

B

Explanation:

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A. Two strands of nucleotides bonded together at their bases,

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Applying Kirchhoff’s Junction Rule, what happens to the power source and current when the parallel circuit has two branches, eac
slamgirl [31]

The power source voltage remains the same in a  parallel circuit,

And we'll have equal current in both lines

<h3>Kirchhoff's junction rule</h3>

Generally, Kirchhoff's junction rule states that when there is current flow at any junction of a circuit, the total sum of this current rushing into the junction amount to the same amount of current out of the Node.

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7 0
2 years ago
The relation of mass m, angular velocity o and radius of the circular path r of an object with the centripetal force is-
k0ka [10]

Answer:

Correct option not indicated

Explanation:

There are few mistakes in the question. The angular velocity ought to have been denoted with "ω" and not "o" (as also suggested in the options).

The formula to calculate a centripetal force (<em>F)</em><em> </em>is

<em>F</em> = mv²/r

Where m is mass, v is velocity and r is radius

where

While the formula to calculate a centrifugal force (F) is

<em>F </em>= mω²r

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<u>From the above, it can be denoted that the relationship been referred to in the question is that of a centrifugal force and not centripetal force, thus the correct option should be</u> C.

NOTE: Centripetal force is the force required to keep an object moving in a circular path/motion and acts inward towards the centre of rotation while centrifugal force is the force felt by an object in circular motion which acts outward away from the centre of rotation.

8 0
3 years ago
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Elis [28]

To calculate the speed of an object divide the distance the object travels by the amount of time it takes to travel the distance. Can be written as speed=distance/time (s=d/t ).

The speed equation consists of a unit of distance divided by a unit of time

4 0
3 years ago
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