JAMB - Physics (1987 - No. 22)
A boat at anchor is rocked by waves whose crest are 100m apart and whose velocity is 25ms-1. At what interval does the wave crest reach the boat?
2500.00s
75.00s
4.00s
0.25s
คำอธิบาย
Distance between the boat and crest = 100m
time = \(\frac{100}{25}\)
= 4sec
time = \(\frac{100}{25}\)
= 4sec