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a) A 2.43 m long cord is attached to the ceiling. A mass m = 0.250...

a) A 2.43 m long cord is attached to the ceiling. A mass m = 0.250 kg is suspended at the end of the cord. The cord is pulled to the side a few centimeters and released. What is the period of oscillation?

b) It is determined that for a certain piano string waves travel with a velocity of 303 m/s. What is the frequency of vibration of this string (which is attached at both ends) if it is 0.702 meters long and has 4 nodes?

c)

A hydraulic lift uses a compressor to compress the hydraulic fluid with a moving piston (piston A) of radius RA = 4.50 4.3 cm. A second piston (piston B) of radius RB = 18.0 18.95 cm is used at the lift to lift cars. What force must be applied by piston A to lift a 14,000 N 14,795 car with piston B?
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