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Question: A uniform ladder 5.0 m long rests against a frictionless, vertical wall with its lower end 3.0 m from the wall. The ladder weighs 145 N. The coefficient of static friction between the foot of the ladder and the ground is 0.40. A man weighing 760 N climbs slowly up the ladder
(a) What is the maximum frictional force that the ground can exert on the ladder at its lower end?
(b) What is the actual frictional force when the man has climbed 1.0 m along the ladder?
(c) How far along the ladder can the man climb before the ladder starts to slip?
the sun emits light waves with a power of 4x1026 watts. determine the intensity of light waves from the sun just
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In a large centrifuge used for training astronauts and pilots, a small chamber is fixed at the end of a rigid arm that rotates in a horizontal circle. Evaluate the angular acceleration in the second training exercise
Describe in your own words what the root locus is and how it can be used to aid in compensator design. Be sure to explain the magnitude and angle conditions.
A 4.8 m diameter merry-go-round is rotating freely with an angular velocity of 0.725 rad/s. Its total moment of inertia is 1565kg*m2. Four people standing on the ground, every of mass61.8 kg, abruptly step onto the edge of the merry-go-round.
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A merry-go-round of radius R=2.0m has a moment of inertia I=250kg m^2, and is rotating at 10rpm. A child whose mass is 25 kg and is at rest grabs onto the edge of the merry-go-round. The new angular speed (in rpm) of the merry-go-round is approximate..
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The Millenium Falcon is chased by the Imperial Forces. The ship is moving at a speed of 0.549 c. What is the velocity of the protons in the resting frame when the cannon is shot in the backward direction
A lens objective magnifies on an object 10 cm away by 12 times in air. The magnitude of an eyepiece focal length of 2cm. How far apart must the lenses be placed
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