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    Acceleration of a Tennis Racket

    ohh hahahah thanks !!!!
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    High Speed Camera

    High speed cameras are used to photograph events which take place too quickly to be seen by the human eye. One such high speed camera is composed of a rotating film drum, a rotating shutter and some miscellaneous optics. The film is fastened along the outside of the drum (along its entire...
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    Compact Disk

    Unlike the older vinal records which rotated at a constant ω of 33.3 rotations per minute (rpm), compact disks vary their rotation speed during the playing period. A certain CD has a diameter of 12cm and a playing time of 77 minutes. When the music starts, the CD is rotating at 480 rpm. At the...
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    Acceleration of a Tennis Racket

    Homework Statement During a serve, a tennis racket of mass 1.4 kg is given an angular acceleration of 163 rad/sec2. At the top of the serve, the racket has an angular speed of 16 rad/sec. If the distance between the top of the racket and the shoulder is 1.5 m, what is the total acceleration of...
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    Exploding Shell

    A shell of mass 0.4 kg is at rest in a gravity-free environment when it suddenly explodes into three fragments. The mass and x,y components of two of the fragments is given in the table: particle mass (kg) vx (m/s) vy (m/s) [1] 0.12 25 58 [2]...
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    Three Blocks

    part a is correct because the homework is on a software and it accepted my answer
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    Three Blocks

    1. Homework Statement Blocks of mass 5, 10, and 25 kg are lined up from left to right in that order on a frictionless surface so each block is touching the next one. A rightward-pointing force of magnitude 14 N is applied to the left-most block. a) What is the magnitude of the force that...
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    Torque by a Muscle

    Homework Statement A man holds a 196 N ball in his hand with the forearm horizontal as shown on the drawing to the left. He can support the ball in this position because of force, Fb from his bicep flexor muscule which is applied perpendicular to the forearm. This force applies a torque...
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    Three blocks

    lol i still dunno what numbers to use in what formula
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    Three blocks

    so then i do 14=5a then the a is 2.8 n if i multiply that im gonna get 14 again ... im confused !!:confused:
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    Three blocks

    so then what formula do i use ?
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    Three blocks

    F = (5)(.35) = .175
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    Three blocks

    sorryy my mistake i got it for part a which was 8.75 but when i did it again for part b it said wrong
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    Three blocks

    i tried f = ma this is what i did m = 5+10+25 = 40 14 = 40(a) a = .35 but it said thats not the right answer
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    Three blocks

    Homework Statement Blocks of mass 5, 10, and 25 kg are lined up from left to right in that order on a frictionless surface so each block is touching the next one. A rightward-pointing force of magnitude 14 N is applied to the left-most block. Homework Equations [a] What is the...
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