An athlete whirls a 7.00 kg hammer tied to the end of a 1.1 m chain in a horizontal circle. The hammer makes one revolution in 0.9 s. What is the tension in the chain?
11th grade pre ap physics - drwls, Tuesday, December 14, 2010 at 7:09am
The speed of the hammer must be
V = 2 pi*1.1/0.9 = 7.68 m/s. The chain cannot not be quite horizontal, but tipped at an angle A (to support the weight) so that
M V^2/R = T cos A and
M g = T sin A
tan A = g R/V^2 = 0.183
which means that
A = 10.3 degrees
T = (M V^2/R)/cos10.3 = ______
If you do not include the cos 10.5 factor, your answer will be about 2% off.
11th grade pre ap physics - Corey, Wednesday, January 5, 2011 at 7:30pm
This is the wrong answer, do not copy it
11th grade pre ap physics - vinay, Monday, January 2, 2012 at 11:33pm
11th grade pre ap physics - vinay, Monday, January 2, 2012 at 11:34pm
396 N (approx)
11th grade pre ap physics - ShMuel, Thursday, March 7, 2013 at 10:51pm
A single electron is placed in an electric field where the intensity 103.5 N/c. What force does the electron experience?