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In Fig., the winding drum of a lift is driven by an electric motor via a gearbox having a reduction ratio of 20:1. The direct inertia on the motor shaft is 0.05 kg m2 and that on the winding shaft is 20 kg m2. The drum, which has a diameter of 600 mm, moves a lift by means of a cable wound around it. If the lift has a mass of 500 kg, find the torque required from the motor to raise the lift with an acceleration of 2 m/s2.
A spring with a spring constant of 1.9×102N/m is attached to a1.6 kg mass and then set in motion. What is the frequency of the vibration? What is the period of the mass-spring system?
The 1994 Winter Olympics included the aerials competition in skiing. In this event skiers speed down a ramp that slopes sharply upward at the end. The sharp upward slope launches them into the air, where they perform acrobatic maneuvers.
A person desires to reach a point that is 3.40 km from her present location and in a direction that is 350 north of east. However, she must travel along streets that are oriented either north-south or east-west. What is the minimum distance she mi..
a section of wire 10.0 m long has a resistance of 4.00 o. a what is the resistance of 25.0 m of this wire? b what is
A toaster uses a Nichrome heating wire. When the toaster is turnedon at 20° C, the initial current is 1.50 A. A few secondslater, the toaster warms up and the current now has a value of 1.28A.
a thin gold ring of radius 1.02 cm carries a uniform charge per unit length of 1.02e-14 cm. find the electric field on
For a double-slit experiment with slit spacing 0.2 and wavelength 600, at what angular position is the path difference equal to one-fourth the wavelength.
a package has mass of 200 kg is on a horizontal floor. resistance to its motion other than that due to friction is
Determine the angular speed of a speck of dirt located 1.97 cm from the center of a CD rotating inside a CD player at 263 rpm.
A point charge (m = 1.0 g) at the end of an insulating string of length 53 cm (Fig. 16-66) is observed to be in equilibrium in a uniform horizontal electric field of E = 9500 N/C, when the pendulum's position is as shown in Fig. 16-66, with the charg..
A butterfly moves with a speed of v = 12.0 m/s east of North. The y-component of its velocity is 8.00 m/s. The angle between the direction of its motion and the x-axis.
An ideal gas occupies a volume of 1.0 cm3 at 20°C and atmospheric pressure. Obtain the number of molecules of gas in the container
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