Help please! (1 Viewer)

[Run hard@thehsc]

 

[username_2]

View attachment 34852

Using, ω = v/r = 3/(0.20) = 15 rad s^-1 but this doesn't match any of the answers... so i think it would be worth checking the source?

 

[Run hard@thehsc]

@username_2 0.2m would be the length and not the radius I guess

 

[username_2]

@username_2 0.2m would be the length and not the radius I guess

yep you are right exactly so now what this becomes is a conical pendulum problem. So first i need to know the actual radius to find the exact value for the ω and how would I find this - imagine a conical pendulum:


Now its been a while since i've done such problems so im leaving it to you to find the tension in the string and finishing the problem. If anyone has any other way feel free to write it here. But what i really think is that the question lacks all of the required information to determine the angular frequency.. dunno seems to complicated for a MCQ.

 

[Run hard@thehsc]

yep you are right exactly so now what this becomes is a conical pendulum problem. So first i need to know the actual radius to find the exact value for the ω and how would I find this - imagine a conical pendulum:
View attachment 34853

Now its been a while since i've done such problems so im leaving it to you to find the tension in the string and finishing the problem. If anyone has any other way feel free to write it here. But what i really think is that the question lacks all of the required information to determine the angular frequency.. dunno seems to complicated for a MCQ.

I agree - I found this in a Penrith trial paper