Physics

Physics, 13.10.2019 15:00, brentkellen6331

The coefficient of sliding friction on concrete is .30 what weight of steel can be pulled across a concrete floor by a winch with a 450 ib capacity

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Physics, 27.07.2019 09:00, onegirl435

Aforce of 25.0 n is required to start a 3.0 kg box moving across a horizontal concrete floor. (a) what is the coefficient of static friction between the box and the floor? (b) if the 25.0 n force continues, the box accelerates at 0.50 m/s2. what is the coefficient of kinetic friction?

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Physics, 24.09.2019 23:30, ghwolf4p0m7x0

1. all of the following show friction as a useful force, except the heat energy produced when two surfaces rub together having to push a rough and heavy box across the floor to move it the friction between your feet and the floor keeping you from slipping the tread on tires the moving vehicle slow down and stop when necessary 2. if the mass of an object increases, predict what will happen to the coefficient of sliding friction. the coefficient of sliding friction will increase. the coefficient of sliding friction will decrease. the coefficient of sliding friction will stay the same. the coefficient of sliding friction will decrease by half 3. in general, the friction involved in sliding an object is (less than, greater than, or equal to) the friction involved in rolling an object. 4. what kind of friction exists between solid objects moving in water? static friction sliding friction rolling friction drag 5. select all that apply. (select all that are correct, even if it's more then one) the resistance to an object being pulled over a surface is called starting friction sliding friction static friction kinetic friction

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Physics, 27.09.2019 09:20, MemnochRize

Suppose you have to move a heavy crate of weight 875 n by sliding it along a horizontal concrete floor. you push the crate to the right with a horizontal force of magnitude 300 n, but friction prevents the crate from sliding. what is the magnitude fp of the minimum force you need to exert on the crate to make it start sliding along the floor? let the coefficient of static friction ? s between the crate and the floor be 0.56 and that of kinetic friction, ? k, be 0.47.

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Engineering, 05.11.2019 05:31, tyrique86

Acomposite floor system consists of w18 x 97 beams and a 5-inch-thick reinforced concrete floor slab. the span length is 30 feet, and the beams are spaced at 8 feet. in addition to the weight of the slab, there is a construction load of 20 psf. a uniform live load of 800 psf is expected during the life of the floor. assume that there is no support during the construction phase. a992 steel is used, and normal weight concrete is used (we = 145 ). the 28-day compressive strength of concrete is f' = 4 ksi. a) compute the total stress at the bottom of steel and the stress at the top of concrete. b) determine the flexural strength of the composite section.

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