The wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats.
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
A CLOSED SYSTEM. In a closed system in which energy moves freely in and out, but no matter enters or leaves.
Fnet=ma so m = fnet/a 100/5=20 the mass is 20
Answer:
Instantaneous Speed - The speed of an object at a given moment.
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