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You are designing a lathe motor, part of which consists of auniform cylinder whose mass is 90 kg and whose radius is 0.40 mthat is mounted so that it turns without friction on its axis,which is fixed. The cylinder is driven by a belt that wraps around its perimeter and exerts a constant torque. At t = 0, thecylinder‘s angular velocity is zero. At t = 25 s,its angular speed is 500 rev/min. (a) What is themagnitude of the cylinder‘s angular momentum at t =25 s? (b) At what rate is the angular momentum increasing?(c) What is the magnitude of the torque acting on thecylinder? (d) What is the magnitude of the frictional force acting on the rim of the cylinder?
when a signal of intensity 3.0kwm-2 is applied at the input of an amplifier of length 10m the output signal intensity
A 815-kg car stopped at an intersection is rear-ended by a 1740-kg truck moving with a speed of 13.0 m/s. find the final speed of both vehicles after the collision
An experimenter arranges to trigger two flash bulbs simultaneously, What is the time interval between them according to her
electrons are ejected from a metallic surface with speeds up to 460000 m/s when light of wavelength 650 nm is used. find the work funtion
A physics book slides off a horizontal tabletop with a speed of 2.30 m/s. It strikes the floor in 0.350 s. Find the height of the tabletop above the floor
A 51.0-kg woman wearing high-heeled shoes is invited into a home in which the kitchen has vinyl floor covering. If the woman balances on one heel, what pressure does she exert on the floor
Three positive charges are fixed in place. Q 1= +4.0 nC and is located at (0,2), Q2= +1.0 nC and is located at (0,-1), What is the electric potential at the origin
A ball whose mass is 1.3 kg is suspended from a spring whose stiffness is 3 N/m. Suppose this apparatus were taken to the Moon, where the strength of the gravitational field is only 1/6 of that on Earth. What would the period be on the Moon
A uniform 34.5-kg beam of length = 4.95 m is supported by a vertical rope located d = 1.20 m from its left end as in the figure below. The right end of the beam is supported by a vertical column.
A stone has a mass of 6.0 x 10-3 kg and is wedged into the tread of an automobile tire, as the drawing shows. The coefficient of static friction between the stone and each side of the tread channel is 0.90.
Thermal expansion increases the length of a clock's pendulum by a fractional increase of 4.1×10^-5, Under these conditions, how much error in timekeeping accumulates over 1 day
Two long, parallel wires are separated by a distance of 2.50cm . The force per unit length that each wire exerts on the other is 3.20×10?5N/m, determine the current in the second wire
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