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A 4.7 meter long, 450 kilogram steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 70 kilogram construction worker stands at the far end of the beam. Estimate what is the magnitude of the torque about the point where the beam is bolted into place?
A curve in a road forms part of a horizontal circle. As a car goes around it at constant speed 14.0 m/s, What is the total horizontal force on the driver
A force, F=(Three x square N)i +(4N)j, with x in meters, acts on aparticle, changing only the kinetic energy of the particle. how much work is done on the particle as it moves fromcoordinates (2m, 3m) to ( 3m, 0m)
The 1.00 x 1020 electrons flow through a cross section of a 5.00 millimeter diameter iron wire in 6.00 second. Determine what is the electron drift speed
A 75.0 kg stunt man jumps from a balcony and falls 24.0 mbefore colliding with a pile of mattresses. what is the averageforce exerted by the mattresses on thestuntman
A cooling fan is turned off when it is running at 880rev/min . It turns 1000 revolutions before it comes to a stop. What was the fan's angular acceleration, assumed constant
A rock is launched from a wall 15 m above a moat at a speed of 29m/s at an angle of 36 deg above horizontal. How far from the wall does the launched rock hit the ground?
It is observed that the size of a real image formed by aconcave mirror is four times the sizeof the object when the object is 34.5cm in front of the mirror. What is the radius of curvature of this mirror
A 6 m board of mass 5 kg is hinged at one end, with a 60 kg block nesting on the board 202 cm from the hinge. Find the force exerted by the hinge at this angle
Three charges, each of magnitude 2 nC, are at separate corners of a square of edge length 6 cm. The two charges at opposite corners are positive, and the other charge is negative. Discover the force exerted with these charges on a fourth charge q = +..
the overall volume compression ratio of a reversed carnot cycle working with air as a refrigerant is 10. the
Two people, one of mass 88kg and the other of mass 62kg , sit in a rowboat of mass 68kg. With the boat initially at rest, In what direction will the boat move
A typical AAA battery has stored energy of about 3400 J. (Battery capacity is typically listed as 625 mA h, meaning that much charge can be delivered at approximately 1.5 V.) what must the area of each plate be
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