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Q. One on an Incline--One Hanging A block of mass mA = 4.50 kg on a frictionless inclined plane of angle 30.0° is connected by a cord over a massless, frictionless pulley to a second block of mass mB = 2.80 kg hanging vertically.

Q. A rocket engine emits 3.04 x 10^4 J of sound energy every second. The sound is emitted uniformly in all directions. What is the sound intensity level, measured relative to the threshold of hearing, at a distance of 120 m away from the engine? Hint: The threshold of hearing is I0 = 1 × 10-12 W/m2.

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