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BAED-PHYC2121 General Physics 1
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11.1 General Features of Harmonic Motion
The position of a 0.64-kg mass undergoing simple harmonic motion is given by x = (0.160 m) cos (πt/8). What is its period of oscillation?0%
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A ping-pong ball has an average density of 0.0840 g/cm3 and a diameter of 3.80 cm. What force would be required to keep the ball completely submerged under water?
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A 2.00-kg copper rod is 47.00 cm long at 25°C. If 50,000 J are transferred to the rod by heat, what is its change in length? ccopper = 387 J/kg⋅°C and αcopper = 17 × 10−6/°C.
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A circular disk is rotating about a central axis with an angular velocity which is increasing at a constant rate. Point 1 on the disk is located at a distance0%
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A 0.19-m radius grinding wheel takes 2.8 s to speed up from 3.0 rad/s to 12.0 rad/s. What is the wheel's average angular acceleration?0%
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The use of fiberglass insulation in the outer walls of a building is intended to minimize heat transfer through the wall by what process?
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A waterfall is 140 m high. What is the increase in water temperature at the bottom of the falls if all the initial potential energy goes into heating the water? (g = 9.8 m/s2, cw = 4,186 J/kg⋅°C)
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A 200-N uniform ladder, 12.0 m long, rests against a smooth vertical wall. The coefficient of static friction between ladder and floor is 0.35. What minimum angle can the ladder make with the floor before it slips?0%
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Water (density = 1 × 103 kg/m3) flows at 15.5 m/s through a pipe with radius 0.040 m.The pipe goes up to the second floor of the building, 3.5 m higher, and the pressure remains unchanged. What is the speed of the water flow in the pipe on the second floor?
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A 15.0-kg crate, initially at rest, slides down a ramp 5.0 m long and inclined at an angle of 20° with the horizontal. If there is no friction between ramp surface and crate, what is the kinetic energy of the crate at the bottom of the ramp? (g = 9.8 m/s2)
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