posted by javane .
An athlete whirls in a 7.10-kg hammer tied to the end of a 1.2 m chain in a horizontal circle, as shown in the figure below. The hammer makes one revolution in 1.0 s.
(a) What is the centripetal acceleration of the hammer?
(b) What is the tension in the chain?
a. 51.2 m/s^2
b. 358.4 N
a 600 kg hammer of pile driver is lifted 2 meters above a piling head. what is the change in potential energy if the hammer is released, what will its speed at the instant it strikes the piling?
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