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A ladder is leaning against a vertical wall. The coefficient of friction between the ladder and the horizontal surface is ?1 = 0.105 and the coefficient of friction between the ladder and the wall is ?2 = 0.103. Determine the maximum angle with the vertical the ladder can make without falling on the ground.
Two air-track gliders of equal mass are initially moving in the same direction along a straight line. What is the speed of the second glider
A cart of 0.5 kg hits a fixed cart of 1.5 kg with a velocity of 3 m/s in the north direction. Both carts get stuck together and move, What is the direction of the velocity vector
q1. a dentists drill starts from rest. after 3.20 s of constant angular acceleration it turns at a rate of 2.46 104
The toadfish makes use of resonance in a closed tube to produce very loud sounds. The tube is its swim bladder, used as an amplifier. Calculate the intensity of the sound wave emitted
How much work did the movers do (horizontally) pushing a 190-{rm kg} crate 11.2 m across a rough floor without acceleration, if effective coefficient of friction was 0.60.
What is the magnitude of the apparent weight of a 68kg astronaut 2600km from the center of the Earth's Moon in a space vehicle accelerating toward the Moon at 2.1m/s2
During a particular car crash, it takes just 0.18s for the car to come to a complete stop from 50 km h -1. At what rate is the car accelerating during the crash
A horizontal pipe shown in the figure has a cross-sectional area A1 = 37.5cm2 at the wider portions and A2 = 9.40cm2 at the constriction. Find the flow speed at the wide portion
A horizontal block-spring system with the block on a frictionless surface has total mechanical energy E = 49.2 J and a maximum displacement from equilibrium of 0.280 m.
question1a guitar string is 90 long and has the mass of 3.4. the distance from a bridge to the support post is and
A standing wave is in a open end tube. The tube length is 1.80m, determine the fundamental frequency
The desperate contestants on a TV survival show are very hungry. The only food they can see is some fruit hanging on a branch high in a tree. With what speed does the rock leave the spring
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