Rupert (66 kg) is now in a full-pipe of radius 25 m, calculate the minimum speed at which rupert can skate to ensure he will not a fall off the skateboard at the top of the pipe? **show work**

at the top most point if Rupert will not fall then normal force at the top point is almost zero for minimum speed

so here we can say

now if

so above will be the minimum speed

c

explanation:

a.) travels faster in solids because the particles are closer together.

air is a gas water is a liquid