Understanding Centripetal Force and Oblateness

The video explains how centripetal force increases with the radius of a spinning object, causing it to become oblate or ellipsoidal. This phenomenon is observed in planets like Earth, which is slightly wider at the equator than at the poles. The video further compares the oblateness of Earth with that of Jupiter and Saturn, noting that the latter two are more visibly oblate due to their faster rotation speeds.

What happens to the centripetal force when the radius of a spinning object increases?

• It decreases

• It remains the same

• It increases

• It fluctuates

Why does a spherical object become oblate when it spins?

• Due to air resistance

• Due to gravitational pull

• Due to magnetic fields

• Due to centripetal force

How much wider is the Earth at its equator compared to its meridians?

• 0.3 percent

• 11 percent

• 3 percent

• 7 percent

Which planet is about 7 percent oblate?

• Earth

• Saturn

• Mars

• Jupiter

Which planet's oblateness is clearly visible?

• Earth

• Jupiter

• Mars

• Saturn