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A floodlight with a mass of 23 kg is used to illuminate the parking lot in front of a library. the floodlight is supported at the end of a horizontal beam that is hinged to a vertical pole, as shown. a cable that makes an angel of 19 degrees with the beam is attached to the pole to help support the floodlight. assume the mass of the beam is neglible when compared with the mass of the floodlight. find the horizontal force exerted on the beam by the pole. answer in units of N.
A Molecule of DNA is 2.17 um long. The ends of the molecule become strongly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 0.78% upon becoming charged. Determine the effective spring con..
The initial angle of the ball’s motion off the tee is 29.0° above the horizontal. If the tee level is 17.0 m above the level of the fairway, explain how far east of the tee does the ball hit the fairway?
Two in-phase speakers 2.0 m apart in a plane are emitting 1800 Hz sound waves into a room where the speed of sound is 340m/s . Is the point 4.0m in front of one of the speakers, perpendicular to the plane of the speakers, a point of maximum constr..
If the bee walks on the stick with a speed of 1.44 cm/s relative to the still water, what is the speed of the stick relative to the water
Sketch a PV diagram and find the work done by the gas during the following stages. Find the net work done during the complete cycle
A continuous line of charge lies along the x axis, extending from x = +x0 to positive infinity. The line carries positive charge with a uniform linear charge density ?0.
a map suggest that atlanta is 730 miles in a direction of 5.00°north of east of dallas find net displacement vector from dallas to chicago
A bullet of mass 0.012 kg traveling horizontally at a high speed of 280 m/s embeds itself in a block of mass 3 kg that is sitting at rest on a nearly frictionless surface. Calculate the total translational kinetic energy
Determine magnitude of the force
A speeder is pulling directly away and increasing his distance from a police car that is moving at 25 m/s with respect to the ground. Find the speeder's speed with respect to the ground
Two physicists (on oppisite sides of a cage) are pulling on ropes tied to a lion. What are the force T2 and angle theta 2 of the rope pulled by the physicist 2
a car originally traveling at 30 m/s manages to brake for 5 seconds while traveling 125 m down hill. find the acceleration of the car after the brakes failed
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