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A ladder with a length of 5.0 m and a weight of 450 N is placed so its base is on the ground 4.0 m from a vertical frictionless wall, and its tip rests 3.0 m up the wall. The ladder remains in this position only because of the static friction force between the ladder and the ground. You, with a weight of 500 N, are standing on the ladder at a horizontal distance of 2.60 m from the wall. Assume the mass of the ladder is uniformly distributed.
(a) Find the magnitude of the upward normal force applied by the ground on the ladder.
(b) Find the magnitude of the horizontal normal force applied by the wall on the ladder.
(c) Determine the minimum possible coefficient of static friction for the ladder-ground interaction, for the ladder to remain at rest.
A closed box is filled with dry ice at a temperature of -80.4 oC, while the outside temperature is 20.8 oC. Find the thermal conductivity of the material from which the box is made
determine the speed of the ball after the ball. A positive charge q is fired by a small hole in the positive plate of a capacitor.
The frequency of an opera singer is 450 Hz. Assume the speed of sound in air is 340 m/s. What is the frequency heard by an observer who is running down the road towards the opera singer with a speed 25.0 m/s.
A cylindrical tank 3.0m deep is full to the brim with water. Sunlight first hits part of the tank bottom, Find the tank's diameter.
An engine absorbs 3,450 J of heat energy each cycle and expels 1,240 J. how much work does it do in one cycle
Suppose the tension in a cord is 12.0 N. If the speed of a wave in the cord is 9.50 m/s, then what must be the linear mass density of the cord
Two musicians are comparing their clarinets. The first clarinet produces a tone that is known to be 442Hz, If the second clarinet produces a higher pitched tone than the first clarinet, what is the second clarinet's frequency
An object is placed 17.4 cm to the left of a thin diverging lens that has focal length ?11.7 cm. What is the distance between the object and the image
An uncharged capacitor and a resistor are connected in series to a source of emf. If emf = 10.00 V, C = 19.0 µF, and R = 100 ?, find the maximum change on the capacitor
The period of motion of an object-spring system is T = 0.546 s when an object of mass m = 254 g is attached to the spring, Find the frequency of motion in hertz
a 250-kg motorcycle goes around an unbanked turn of radius 13.7m at a steady 96.5 km/h. What is the magnitude of the net force on the motorcycle?
A semicircle of radius a is charged.positive charge +Q is distributed uniformaly around the left half of the semicircle, what are the magnitude and the direction of the electric field
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