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A 100 kilogram person is three fourths of the way up a 10 meter ladder that is resting against a smooth frictionless wall. The ladder has a mass of 25 kilogram and makes an angle of 60o with the surface.
a) Find what is the normal force of wall on the ladder?
b) Find what is the normal force of floor on the ladder?
A regulated 0-50v power supply with 0.9Ohm internal resistance isused to deliver electric power to a 0.1Ohm heating element. Compare the power delivered to the heating element when it is connecteddirectly to the power supply with the power deliver..
consider the motion of an apple and the earth as the apple falls to the ground. if the apple begins at the top of a
A car with a total mass of 1.57 103 kg has wheels of radius 32.5 cm and moment of inertia 0.875 kg · m2. Find the car's rotational energy when the car is moving at a speed of 21.0 m/s
the armature of an ac generator has 100 turns. each turn is a rectangular loop measuring 8.0 cm by 12 cm. the
A bicycle is moving at 4.00 m/s. WHat is the angular speed of one of its wheels if the diameter is 60.0 cm
A beam of light of a single wavelength is incident perpendicularly on a double-slit arrangement, as in the figure below. The slit widths are each 56 µm and the slit separation is 0.36 mm. How many complete bright fringes appear between the two first-..
Light from a location on which you concentrate your attention fallson your fovea, which contains only cones. If you wish to observe aweak source of light, like a faint star, why should you not look directly at the source?
On a hot summer day (30 degrees Celsius), a pesky little mosquito produced its warning sound near your ear. What is the frequency in Hertz of the sound wave
Water moves through a constricted pipe in steady, ideal flow. At the lower point the pressure is 1.70 105 Pa and the pipe radius is 3.00 cm. Find the volume flow rate through the pipe
A cube of ice is taken from the freezer at -8.50C and placed in a 95-g aluminum calorimeter filled with 310 g of water at room temperature of 200C
Consider a bird that flies at an average speed of 10.7m/s and releases energy from its body fat reserves at an average rate of 3.70W, How far will the bird fly before feeding again
A charge of 6.53mC is placed at each corner of a square .470 m on a side. Determine the direction of the force on each charge
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