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a ball rolls down a 100m.the hill is inclined at 60 degrees. if the ball has a rotational inertia of 10kg-m^2 and starts from rest, what is the final rotational speed of the ball?(you must use the conservation of energy)
Styrofoam has a density of 300 kg/m^3 . What is the maximum mass that can hang without sinking from a 20.0cm -diameter Styrofoam sphere in water? Assume the volume of the mass is negligible compared to that of the sphere.
A nonconducting solid sphere of radius R has a volume charge density that is proportional to the distance from the center. That is, ? = Ar for r R, where A is a constant. (Use the following as necessary: 0, A, r, and R, as necessary.)
How much work does the electric field do in moving a -7.7 microCoulomb charge from ground to a point whose potential is +positive 55V higher.
A college campus features a large fountain surrounded by the circular pool. Two students start at the northernmost point of pool and walk slowly around it in opposite directions.
Calculate the location of the center of mass of the Earth-Moon-Sun system during a full Moon. A full Moon occurs when the Earth, Moon, and Sun are lined up. make Use of a coordinate system in which the center of the sun is at x=0 and the Earth and..
An infinitely long line of charge has linear charge density 4.00 10-12 C/m. A proton (mass 1.67 10-27 kg, charge +1.60 10-19 C) is 17.0 cm from the line and moving straight toward the line at 3000m/s.
A bag of cement of weight 375 N hangs from three wires as suggested in Figure P5.18. Two of the wires make angles θ1 = 55.0° and θ2 = 25.0° with the horizontal. If the system is in equilibrium, find out the tensions in the wires.
One mole of an ideal gas at 27 °C is expanded isothermally from an initial pressure of 3 atm to a final pressure of 1 atm in two ways. (a) reversible, and (b) against a constant external pressure of 1 atm. find q, w, ΔU, ΔH, ΔSsys, ΔSsurr, ΔStotal..
A 165 pF capacitor is connected in series with an unknown capacitor, and as a series combination they are connected to a battery with emf of 21.3 V. If the 165 pF capacitor stores 112 pC of charge on its plates, what is the unknown capacitance.
An airplane is flying in a horizontal circle at a speed of 520 km/h. If the wings of the plane are tilted 34° to the horizontal, what is the radius of the circle (in m) in which the plane is flying? Assume that the required force is provided entir..
Ladder 6.55 m long leans against the side of a building. If the ladder is inclined at an angle of 65.5° to the horizontal, what is the horizontal distance from the bottom of ladder to the building.
What mass can it support in water before sinking. Two concentric spherical shells with uniformly distributed masses M1 = kg and M2 = kg are situated as shown . Find out the magnitude Find the magnitude of the net gravitational force on a particle ..
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