Sample Exam3 Answers

1.    b             2.     Torque=4.5Nm

3.    omega=10.0Rad/s

4.    c             5.         wavelength=0.02m

6.a)    mg-F(tension)=ma, a=R*alpha, F(tension)*R=I*alpha
    b)    I=(F(tension)*R^2)/a=[(mg-ma)R^2]/a

    c)     I=0.0176kg m^2

    d)    F(tension)=1.76N
    e)   Torque=0.176Nm

7.    a)    T=0.500s  k=631.7N/m
        b)    E(tot)=19.7J
c)    KE(equilib)=19.7J
d)    x(1.5s)=0.250m

8 THIS IS CH. 14 MATERIAL.  WE WILL ONLY HAVE EXAM 3 ON CH10,11 and 13.

9.    a)    v(wave)=20.0m/s
b)    f=2.50Hz
         wavelength=8.0m
c)    v(new)=14.14m/s
d)    f(new)=unchanged   2.50Hz
       wavelength(new)=5.66m