Answer:
I think it is D but don't count on it
Answer:
One way to look at this is to consider the forces acting on any point in a string.
For a very small portion of string F = M a must still hold. As M approaches zero the small portion of string would have to approach infinite acceleration if the net force on that portion of string were not zero.
One generally considers the net force acting on the center of mass of an object not the individual forces acting on each infinitesimal mass composing
the object.
Answer:
The speed, magnitude of the velocity, magnitude of the angular velocity, magnitude of the centripetal acceleration, magnitude of the net force and direction of the angular velocity are constant.
Explanation:
In uniform circular motion we have a centripetal acceleration of constant magnitude but changing direction (since it points to the center of the circle from the object). The same goes for the net (centripetal) force since F=ma. This makes the magnitude of the velocity (speed) constant but its direction changes, although keeping spinning in the same direction, which makes its angular velocity constant in both magnitude and direction.
Answer: Conversion of 9.83 m/s with a radius of 0.85 m into rotations per minute (rpm) is 
.
Explanation:
Given: Speed = 9.83 m/s
Convert m/s into m/minute as follows.
Radius = 0.85 m
Now, rotations take place in circular motion. So, the circumference of a circle is 
.
Therefore, circumference is calculated as follows.
Formula used to calculate rotations per minute (rpm) are as follows.
Thus, we can conclude that conversion of 9.83 m/s with a radius of 0.85 m into rotations per minute (rpm) is .
