During a practice shot put throw, the 7.9-kg shot left world champion C. J. Hunt

Question

During a practice shot put throw, the 7.9-kg shot left world champion C. J. Hunter s hand at speed 16 m/s. While making the throw, his hand pushed the shot a distance of 1.9 m. Determine the average acceleration of the shot. Express your answer to two significant figures and include the appropriate units. Determine the time it takes to accelerate the shot. Express your answer to two significant figures and include the appropriate units. Determine the average force exerted on the shot by hand. Express your answer to three significant figures and include the appropriate units.

Explanation / Answer

b)

acceleration

a = (v^2 / 2*d)

a = = (16^2 / 2*1.9)

a = 67.36 m/sec^2.

c)

Time = v / a

t = 16 / 67.36

t = 0.2375 sec.

d)

Force = m * a

F = 7.9 * 67.36 = 532.14 N

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