A. Angular momentum is always conserved would be the correct answer.
This is because like linear momentum (mvmv), angular momentum (r×mvr×mv) is a conserved quantity, where rr is the vector from the center of rotation. For a skater holding a static pose, for each particle making up her body, the contribution in magnitude to the total angular momentum is given by mirivimirivi. Thus bringing in her arms reduces riri for those particles. In order to conserve angular momentum, there is then an increase in the angular velocity.
hope this helps!
Answer: he used a compass to find the direction of the magnetic field
Answer:
1 km / 15min
Explanation:
The average speed is calculated by simply doing space divided by time so:
2km / 30min that becomes 1km / 15min
Have a good day.
Answer:
acceleration= force / mass
a= 1.48 m/sec^2