Question

1)I attach a 2.0-kg block to a spring that obeys Hookes Lawand supply 16 J of energy to stretch the spring. I release theblock; it oscillates with period 0.30s. The amplitude is

A) 38cm

B)19cm

C)9.5cm

D)4.3cm

2) The motion of a piston in an automobile engine is nearlysimple harmonic. If the 1-kg piston travels back and forth over atotal distance of 10.0cm, what is its maximum speed when the engineis running at 3000rpm?

A)31.4m/s

B)15.7m/s

C)7.85m/s

D)3.93m/s

3)The position of a 0.64-kg mass undergoing simple harmonicmotion is given by x=(0.160m) cos(pt/16). What is the maximum netforce on the mass as it oscillates?

A)3.9x10^-3N

B)9.9x10^-3N

C)1.3x10^-3N

D)6.3N

4)A simple pendulum has a period of 2.0s. What is the pendulumlength (g=9.8m/s^2)

A) 0.36m

B)0.78m

C)0.99m

D)2.4m

5) A wave is traveling in a string at 60 m/s. When the tensionis then increased 20%, what will be the resulting wave speed?

A) also 60m/s

B) 66 m/s

C)72m/s

D)55m/s