A harmonic oscillator starts with an amplitude of 20.0 cm. After 10.0 s, the amplitude decreases to 15.0 cm. If the linear damping coefficient is 2.00 Ns/m, how much mass is oscillating?
A)
30.0 kg
B)
15.0 kg
C)
34.8 kg
D)
17.9 kg
E)
3.88 kg
Question 2
A packing crate slides down an inclined ramp at constant velocity. Thus we can deduce that
A)
a frictional force is acting on it.
B)
a net downward force is acting on it.
C)
a net upward force is acting on it.
D)
it is not acted on by appreciable normal force.
E)
it is not acted on by appreciable gravitational force.
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