Frequency of oscillations of object

[desmond iking]

Homework Statement

what's the frequency of the oscillations of object?

Homework Equations

The Attempt at a Solution

since sin20t = sin wt ,
so , w=20=2pi f ,
my f is 20/2pi . the ans given is C .
which is wrong?

 

[Doc Al]

I'd say that you are correct and that the given answer is wrong.

 

[ehild]

Homework Statement

what's the frequency of the oscillations of object?

Homework Equations

The Attempt at a Solution

since sin20t = sin wt ,
so , w=20=2pi f ,
my f is 20/2pi . the ans given is C .
which is wrong?

Yours is correct. C is wrong.

ehild

 

[rude man]

I third the motion.