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A satellite is to be despun by means of a tangential-release yo-yo mechanism consisting of two masses, 3 kg each, wound around the midplane of the satellite. The satellite is spinning around its axis of symmetry with an angular velocity us ¼5 rad/s. The radius of the cylindrical satellite is 1.5 m and the moment of inertia about the spin axis is C ¼ 300 kg$m2.
(a) Find the cord length and the deployment time to reduce the spin rate to 1 rad/s.
(b) Find the cord length and time to reduce the spin rate to zero.
Near San Francisco, where the vertically downward component of the earth's magnetic field is 4.7 multiply.gif 10-5 T, Find the emf induced between the two sides of the car
Over a time interval of 1.92 years, the velocity of a planet orbiting a distant star reverses direction, changing from +19.7 km/s to -19.1 km/s.
A 5 kg block is dragged on a horizontal surface in a circular path of radius 2 m. what is the work done by friction during one turn
A copper bar of thermal conductivity 401 W/(m · K) has one end at 108° C and the other end at 18° C. What is the rate of heat conduction along the bar
A pilot wants to fly due north a distance of 125 km. The wind is blowing out of the west at a constant 35 km/h. If the plane travel at 175 km/h, how long would the trip take.
A 120 cm length of string has a mass of 2.50 g. It is stretched with a tension of 7.00 N between fixed supports. what is the lowest resonant frequency of this string
In a purely LC circuit, describe how energy is shared between the inductor (L) and capacitor (C) in the form of electric and magnetic fields
A football is thrown toward a receiver with an initial speed of 16.2 m/s at an angle of 35.6 degree above the horizontal. Find with what constant speed should the receiver run to catch the football at the level at which it was thrown
A crate is pushed along a flat surface at constant velocity by a force of 68 N. The coefficient of kinetic friction is .30. What is the mass of the crate
suppose that a ferrari and a porsche begin a race with a moving start and each moves with constant speed. one lap of
An archer wishes to shoot an arrow at a target at eye level a distance of 56.5 m away. what angle should the arrow make with the horizontal
A 7650kg iceberg with density 931 kg/m3 is afloat in seawater with density 1030 kg/m3. find the buoyant force on the iceberg
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