In the hammer throw, an athlete spins a heavy mass in a circle at the end...

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In the hammer throw, an athlete spins a heavy mass in a circle at the end...

In the hammer throw, an athlete spins a heavy mass in a circle at the end of a cable before releasing it for distance. For male athletes, the "hammer" is a mass of 7.3 kg at the end of a 1.2 m cable, which is typically a 3.0-mm-diameter steel cable. A world-class thrower can get the hammer up to a speed of 29 m/s. If an athlete swings the mass in a horizontal circle centered on the handle he uses to hold the cable. The Tension equals 5120 N.

1) How much does the cable stretch? Young modulus for steel is 20

science physics

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Answer #2

Y = (F/A)/(delta L/L)

==> delta L = (L*F/Y*A)

= (1.2*5120/(20*10^10*pi*(3*10^-3)^2/4)

= 0.00435 m

= 4.35 mm

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