Engineering Mechanics - Planar Kinematics of a Rigid Body (PKRB)
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- Planar Kinematics of a Rigid Body (PKRB) - General Questions
Gear A is in mesh with gear B as shown. If A starts from rest and has a constant angular acceleration of 
A = 2 rad/s2, determine the tome needed for B to attain an angular velocity of 
B = 50 rad/s.
The 2-m-long bar is confined to move in the horizontal and vertical slots A and B. If the velocity of the slider block at A is 6 m/s, determine the bar's angular velocity and the velocity of block B at the instant 
= 60°.
AB = 3.46 rad/s 
, vB = 3.46 m/s 9AB = 3.00 rad/s , vB = 3.00 m/s 9AB = 3.00 rad/s , vB = 6.00 m/s 9AB = 6.00 rad/s , vB = 10.39 m/s 9
Determine the angular acceleration of link BC at the instant = 90° if the collar C has an instantaneous velocity of vc = 4 ft/s and deceleration of ac = 3 ft/s2 as shown.
BC = 36.2 rad/s2 BC = 36.2 rad/s2 
BC = 27.8 rad/s2 BC = 27.8 rad/s2 
During a gust of wind, the blades of the windmill are given an angular acceleration of = (0.2 ) rad/s2, where is measured in radians. If initially the blades have an angular velocity of 5 rad/s, determine the speed of point P located at the tip of one of the blades just after the blade has turned two revolutions.
The pulley os pin-connected to block B at A. As cord CF unwinds from the inner hub with the motion shown, cord DE unwinds from the outer rim. Determine the angular acceleration of the pulley at the instant shown.
= 80.0 rad/s2 = 160.0 rad/s2 = 180.0 rad/s2 = 53.3 rad/s2