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A painter wishes to know whether or not he can safely stand on a ladder. The ladder has a mass M1 = 7.0 kilogram which is uniformly distributed throughout its length L = 7.0 meter. The ladder is propped up at an angle θ =75 degree. The coefficient of static friction between the ground and the ladder is μ = 0.183, and the wall against which the ladder is resting is frictionless.
(a) Determine the maximum mass of the painter for which the ladder will remain stable when he climbs a distance d =4.9 meter up the ladder.
(b) If the painter does not stand on the ladder, find what is the minimum angle θ for which the ladder will remain stable?
What is the probability that a test comes back positive-indicating oil and what is the probability that there is oil in teh ground, if the test comes back positive?
he lifting force exerted on an airplane wing varies jointly as the area of the surface and the square of the planes velocity. Determine the lift if the speed is decreased to 80 mph
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The working load to be supported by the foundation is 2600 kN, use the Sctunertmann's method to estimate the settlement of the foundation for the conditions - Determine the maximum consolidation settlement of the raft foundation.
A conveyor belt at a quarry lifts 2,000 kg of sand per minute up a vertical distance of 12 meters. The sand is originally at rest, then moves at a speed of 0.20 m/s all along the conveyor belt. What is the instantaneous power produced by this machine..
A horizontal beam is attached to a vertical wall by a frictionless hinge and supported from below at an angle = 45o by a brace that is attached to a pin. Evaluate the magnitude of these three forces
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A gas of hydrogen atoms is in the n = 2, l= 1 state. Find the spacing between the three degenerative levels of Ml
a bullet weighing 50 grams and traveling at 200 ms is shot into a stationary block of wood weighing 4 kg where it
A potter's wheel moves uniformly from rest to an angular speed of 0.23 rev/s in 31.0 s. Find its angular acceleration in radians per second
An artillery shell of mass 10.00 kg, lying at rest on the ground, accidentally detonates, exploding into three pieces of shrapnel. Calculate the speed of the third piece of shrapnel
A 2.6kg block slides along a frictionless surface at 1.9m/s . A second block, sliding at a faster 5.0m/s , collides with the first from behind, What was the mass of the second block
You have two springs. One has a greater spring constant than theother. You also have two objects, one with a greater mass than the other. Which object should be attached to which spring, so that the resulting spring-object system has the greatest ..
A wheel, originally rotating at 126 rad/s undergoes a fix angular deceleration of 5.00 rad/s2. Find what is its angular speed after it has turned through an angle of 628 radians
A piece of Nichrome wire passes a current of 0.813 A when a potential of 1.44 Volts is applied. What is the resistance of the wire
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