Answer:
Her moment of inertia decreases causing her spin to speed up. The physics law behind this phenomenon is the conservation of angular momentum.
Explanation:
<em>Theory</em>
<u>The Law of conservation of angular momentum</u>
The angular momentum of a rotating body or a system remains constant unless it is acted upon by an external unbalance force.
Angular momentum = moment of inertia × angular velocity
The moment of inertia = mass×[perpendicular distance from axis of rotation]²
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⇒When skater draws in her outstretched arms the mass distribution get concentrated towards the axis of rotation so the moment of inertia of the body decrease.
But angular moment should conserve so angular velocity increases (spin increases)
Answer:
Hi there!
The answer to this question is the first choice: Xe 138 (top), 54 (bottom)
Because on the left side it adds up to 240 (top) and 94 (bottom)
and the right side adds up to 102 (top) and 40 (bottom)
to equal both sides, you need 138 more to get 240 on the top and 54 on the bottom to get 94. then you use the bottom number 54, to see what element it is and Xenon is the answer.
To continue moving at constant speed in a straight line requires NO net force. Zero. Nada. If there IS any net force on the object, then its speed or direction will change.
Answer:
3.56 m
Explanation:
As the object falls from height h, and then compresses the spring a distance of 0.66m, its initial potential energy is converted into elastics energy of the spring.
Let g = 9.81m/s2. Knowing that the total change in potential height is h + d, we have the following equation