A boat at anchor is rocked by waves whose crests are 50 m apart and whose speed is 10 m/s. These waves reach the boat once every
A) 0.2 s.
B) 5 s.
C) 50 s.
D) 500 s.

Question

Quizplus · Accepted Answer

The time it takes for the waves to reach the boat can be found using the formula:
time = distance / speed
Since the distance between crests is 50 m and the speed of the waves is 10 m/s, the time it takes for the waves to reach the boat is:
time = 50 m / 10 m/s = 5 s. 
Therefore, the correct answer is B) 5 s.

A Boat at Anchor Is Rocked by Waves Whose Crests