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A sledge loaded with bricks has a total mass of 18.0 kg and is pulled at constant speed by a rope inclined at 19.6° above the horizontal. The sledge moves a distance of 21.0m on a horizontal surface. The coefficient of kinetic friction between the sledge and surface is 0.500.
a) What is the tension in the rope?
b) How much work is done by the rope on the sledge?
c) What is the mechanical energy lost due to friction?
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Calculate the de Broglie wavelength ? of an electron with energy EF in sodium, and compare the value with the atomic separation R in sodium
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Two disks are rotating about the same axis. Disk A has a moment of inertia of 9.10 kg·m2 and an angular velocity of +8.10 rad/s. What is the moment of inertia of disk B
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A projectile is fired with an initial speed of 113 m/s at an angle of 60 degrees above the horizontal, from the top of a cliff which is 49.0 meters high. determine time to reach maximum height
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In the x-y plane, a charge of -4.6 microcoulombs is on the x-axis at the point (-30cm,0cm), calculate the magnitude and direction of the resultant electric field E at the origin (0cm,0cm)
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