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A horizontal platform P is held by several rigid bars which are connected to a vertical wire. The period of oscillation of the platform is found to be 2.2 s when the platform is empty and 3.8 s when an object A of unknown moment of inertia is placed on the platform with its mass center directly above the center of the plate. Knowing that the wire has a torsional constant K = 20 lb . ft/rad, determine the centroidal moment of inertia of object A.
An object moves in SHM with amplitude 4.37 m. The phase constant of the function describing its motion is 1.33 rad. What is the object's displacement at time t = 0 s?
An outfielder in baseball throws a baseball from the warning track toward homeplate with a speed of 111.83 125 ft/s at an angle of 40.1640 degrees. where does the ball land relative to homeplate
the tractor-trailer unit is moving down the incline with a speed of 6.8 mihr when the driver brakes the tractor to a
What force is necessary to lift athin wire ring 2.5 cm in diameter from water surface at 20 degree celicious ? surface tension at 20 degree celicious is 0.0718 N/m. neglect the weight of ring
An electron is released from rest at the point midway between the two charges, and it moves along the line connecting the two charges. What is the speed vfinal of the electron
One megabit computer memory chip contains many 6.0 x 10-14 F capacitors. Each capacitor has a plate area of 2.4 x 10-11 m2. Find the plate separation of such a capacitor
The uncertainty in a proton's position is 0.17 nm. What is the kinetic energy of a proton whose momentum is equal to this uncertainty
A worker pulls a box of mass 65 kilogram on the floor at an angle 20 degree above the horizontal. Find the force needed to maintain the box moving with a constant speed
A beam of protons at an accelerator creates a current of 120 mu/A. how many protons strike the target in 30.0 s
A student (m = 63 kg) falls freely from rest and strikes the ground. During the collision with the ground he comes to rest in a time of 0.040 s. From what height did the student fall
A battery with emf 10.30z V and internal resistance 0.50 0 is inserted in the circuit at d, with its negative terminal connected to the negative terminal of the 8.00-V battery. What is the difference of potential Vbc between the terminals of the 4..
A small solid sphere of mass M0, of radius R0, and of uniform density ρ0is placed in a large bowl containing water. It floats and the level of the water in the dish is L. Given the information below, determine the possible effects on the water lev..
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