Periodic Motion QUestion

This forum made possible through the generous support of SDN members, donors, and sponsors. Thank you.

pnoybballin

Junior Member
10+ Year Member
5+ Year Member
15+ Year Member
Joined
Nov 29, 2005
Messages
96
Reaction score
0
If at the lowest point of its arc Mass M has a velocity of ten meters per second, then at how many points in time during the period of one complete cycle does the pendulum have a speed of five meters per second?

A. 1
B. 2
C. 4
D. 8

Hey guys I just want confirmation if my reasoning on this question is correct. Is it C because if you begin from the left for example and the pendulum travels to the right, during that one cycle there are 2 instances where the pendulum travels 5 m/s and coming back from right to left, there are another 2 instances where the pendulum will travel 5 m/s and thus there are 4 points in time in one period? Just wanted to make sure since I originally thought it would be 2.
 
Top