BME Dynamics and Vibrations

Question 1

The natural frequency of a simple spring-mass system is given by:

Accepted Answer

ωn = √(k/m)

Answer

ωn = k/m

Answer

ωn = √(m/k)

Answer

ωn = km

Question 2

Resonance in a vibrating system occurs when:

Accepted Answer

Excitation frequency equals natural frequency

Answer

Damping equals stiffness

Answer

Amplitude equals zero

Answer

Phase angle is zero

Question 3

The damping ratio ζ = 1 corresponds to which type of damping?

Accepted Answer

Critically damped

Answer

Underdamped

Answer

Overdamped

Answer

Undamped

Question 4

In Newton's second law for rotation, the torque is equal to:

Accepted Answer

Iα (moment of inertia × angular acceleration)

Answer

mα

Answer

Iω

Answer

mv²

Question 5

The coefficient of restitution (e) for a perfectly plastic collision equals:

Accepted Answer

0

Answer

1

Answer

0.5

Answer

Infinity

Question 6

D'Alembert's principle transforms a dynamic problem into an equivalent:

Accepted Answer

Static equilibrium problem

Answer

Thermal equilibrium problem

Answer

Fluid flow problem

Answer

Energy balance problem