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A uniform drawbridge must be held at a 35.0?angle above the horizontal to allow ships to pass underneath. The drawbridge weighs 4.05×104N , is 13.5m long, and pivots about a hinge at its lower end. A cable is connected 3.25m from the hinge, as measured along the bridge, and pulls horizontally on the bridge to hold it in place.
If the cable suddenly breaks, what is the initial angular acceleration of the bridge? (in rad/s^2)
A train is travelling up a 4.0 incline at the speed of 3.25 when the last car breaks free and begins to coast without friction. How long does it take for the last car to come to rest momentarily.
A student pushes a 60 kg couch across a carpet at a constant velocity. find the magnitude of the force of the student on the couch
a cylinder contains 4.0moles of a monoatomic gas at an initial temp of 27deg C. How much heat flows in to our out of the gas
The rms current in a copy machine is 7.50 A, and the resistance of the machine is 14.4 ?. What is the peak power delivered to the machine?
A model airplane of mass 0.870 kg is flying at constant speed in a horizontal circle at one end of a 28.0 m cord and at a height of 17.0 m. What is the acceleration of the plane
Two balls of identical mass of 0.151 kg and with identical charges placed on them hang from the ceiling on identical strings of lengths 1.510 m, what is the charge on each ball
A model airplane with mass of 0.754 kg is tethered by a wire so that it flies in a circle 29.5m in radius. The airplane engine provides a net thrust of 0.796 N perpendicular to tethering wire.
A reflecting telescope has a main mirror with fM = 620 mm. If an eyepiece with a magnification of 15 is used, what is the total magnification of the telescope
A motorist suddenly notices a stalled car and slams on the brakes, decelerating at the rate of 6.3 m/s2, How much time elapsed from the initial braking to the collision
What are the magnitude and direction of the resultant vector R , when the parallelogram law is applied to A and B?
A rock of mass 0.340 kg is spun horizontally at the end of a wire that is 1.00 m long and has a diameter of 1.00 mm. what is the Young's modulus of the wire
A rail car that weighs 40 N is accelerated at 6.9 m/s/s for 4.9 seconds. How much work is done on the rail car
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