Two Cranes
Posted in Uncategorized on 02/19/2008 04:04 pm by admin
Piano is 540 kg, down to the next position, while people with two solid. ropes to pull?
Piano 540 kg is reduced to the position by crane. The two people with strong ropes. To extract the. Bob's pulls the rope left. 15 ° below horizontal to 480 N of force. Ellen's rope pulls to the right 25 ° below. Landscape. (A) what Ellen must maintain the momentum of the rope to her piano. Descending at constant speed or not. N (b) strong support in the main piano is what. N.
a) piano from veering to one side or the other is sleeping. Ellen's need to cancel Bob's. It: F_e * cos (25 degrees). = 480 * cos (15 deg) F_e = 480 * (cos (15 deg) / cos (25 degrees) = 480 * (0.9659/0.90631) = 511,575 (N) b) force in the rope will be canceled out. Gravity and momentum in the second pullers: = 540 * 9.8 T. + 480 sin * (15 deg) + 511,575 sin * (25 deg) = 5632 (N).
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