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A uniform ladder 10.0 m long is leaning against a frictionless wall at an angle of 60.0° above the horizontal. The weight of the ladder is 21.2 lb. A 63.2-lb boy climbs 3.60 m up the ladder. What is the magnitude of the frictional force exerted on the ladder by the floor?
Two charges Q1=+6mC and Q2=+4mC are separated horizontally on a straight line, find the magnitude of the electric force between these charges
A ball is thrown vertically upward with an initial speed of 10m/s from the top of a building, at a height of 25m from the ground. How long does the ball take to reach the ground
For the circuit in the figure (Figure 1) , R = 300? ,L = 0.860H and C = 5.00?F . When the source is operated at the resonance frequency, Determine the current amplitude through the resistor
What is the least coefficient of friction between tires and road that will allow cars to negotiate the turn without sliding off the road.
A 730- boulder is raised from a quarry 149 deep by a long uniform chain having a mass of 600. What is the maximum acceleration the boulder can have and still get out of the quarry
A point charge Q is located at the center of a very thin, spherical metal shell. what is the electric potential of the shell
Pat builds a track for his model car out of wood. The track is 14.00 cm wide, 3.00 m long, Locate the horizontal coordinate of the center of gravity of this track
A pendulum consists of a small object hanging from the ceiling at the end of a string of negligible mass. The string has a length of 0.76 m. With the string hanging vertically, the object is given an initial velocity of 2.8 m/s parallel to the ground..
A series AC circuit contains the following components: R = 150 ?, L = 250 mH, C = 2.00 ?F and a source with ?Vmax = 210 V operating at 50.0 Hz. find phase angle between current and source voltage
why the mass of the dishwater is large enough. If vector B is added to C = 2.0 ihat + 3.0 jhat, the result is a vector in the positive direction of the y axis, with a magnitude equal to that of C. What is the magnitude of vector B.
A 148 gram baseball is hit toward the left by a bat. The magnitude of the force the bat exerts on the ball as a function of time, Find the magnitude of the impulse that the bat imparts to the ball
the air speed of a plane is 320km/h. A wind is blowing fromthe southeast at 129km/h. the piolet wishes to fly directly west. calculate the ground velocity of the plain
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