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5 Problems with Solution - Engineering Mechanics-Dynamics | ENGR 3122, Exams of Engineering

Material Type: Exam; Class: Enginering Mechanics-Dynamics; Subject: Engineering; University: Southern Polytechnic State University; Term: Fall 2008;

Typology: Exams

Pre 2010

Uploaded on 08/03/2009

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t~B~
~ _ VEl = 16 m/s
1
Problem 1 (20 points).
Block A has a mass of 10 kg and is connected as shown to block B, which has a mass of
2 kg. Block B has an initial velocity of 16 m/s downward. Determine the time required
for block B to stop. Solve using the Principle of Momentum and Impulse.
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t~ ~B~_ VEl = 16 m/s

1 Block A has a mass of 10 kg and is connected as shown to block B, which has a mass of 2 kg. Block B has an initial velocity of 16 m/s downward. Determine the time required for block B to stop. Solve using the Principle of Momentum and Impulse. I.

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Two smooth disks are moving with the velocities shown and then collide. The masses for disks A and Bare 4 kg and 10 kg, respectively. If the coefficient of restitution is e = 0.8, determine the velocities of both disks after the impact (magnitude and direction).

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r-- Problem 4 (20 points).

In the linkage system below, arm AB has an angular velocity illAB = 5 rad/s and an

angular acceleration aAB = 6 rad/s2 , both in the directiol} indicated. Calculate (1) the acceleration of point B, (2) the velocity at point C, and (3) the angular velocity oflink CD. Be sure to indicate directions. Note that BC is horizontal and CD is vertical at the instant of interest.

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A

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Disk A rotates about point 0 with a constant angular velocity of.Q = 6 radls, and a small

mass B slides in a groove in A as shown. At the time of interest, B is located as indicated and has a velocity of 5 ft/s and an acceleration of 10 ft/s2 relative to the disk in the directions noted. Find the velocity and acceleration ofB. Y,y

o

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x,x

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