A 240g block on a 54 cm -long string swings in a circle on a horizontal, frictio

Question

A 240g block on a 54 cm -long string swings in a circle on a horizontal, frictionless table at 55rpm .

Part 1

What is the speed of the block? Express your answer using two significant figures.

Part2

What is the tension in the string? Express your answer using two significant figures.

A 240g block on a 54 cm -long string swings in a circle on a horizontal, frictionless table at 55rpm . What is the speed of the block? Express your answer using two significant figures. What is the tension in the string? Express your answer using two significant figures.

Explanation / Answer

speed of the block is

v = w/r = 55 * 2*pi /(60 *.54 )= 10.67 m/s

Tension = m*v^2/r = .24 * 10.67^2/0.54 = 50.60 N

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