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A 18800 kg helicopter lifts a 4700 kg truck with an upward acceleration of 1.5 m/s2. Compute (a) the net upward force on the helicopter blades from the air and (b) the tension in the cable among the helicopter and truck.
A ?ghter plane ?ying at constant speed 420 m/s and constant altitude 10000 m makes a turn of curvature radius 2800 m. On the ground, the plane's pilot weighs (62 kg)(9.8 m/s2) = 607.6 N. W
A taut rope has a mass of 0.160 kg and a length of 3.40 m. What power must be supplied to the rope in order to generate sinusoidal waves having an amplitude of 0.120 m and a wavelength of 0.490 m and traveling with a speed of 31.5 m/s?
An RLC circuit is connected to a 220 V 60 Hz ac voltage source. Determine the power loss in the circuit
A resistor with R=300 ? and an inductor are connected in series across an ac source that has voltage amplitude 500 V. What is the amplitude of the voltage across the inductor
A baseball batter sets up in the batting box and holds his bat still over the plate for a moment. How large is the torque exerted by the batter's hand on the bat
The spin cycles of a washing machine have two angular speeds, 437 rev/min and 641 rev/min. The internal diameter of the drum is 0.620 m. Find the laundry's maximum tangential speed
Two skaters, one with mass 65 kg and the other with mass 50 kg, stand on an ice rink holding a pole oflength 10 m and negligible mass. How far does the 50 kg skater move
A76 kg window cleaner uses a18 kg ladder that is 6.0 m long. He places one end on the ground2.9 m from a wall, rests the upper endagainst a cracked window, What is the angle of this force on the ladder
A flywheel comprises a uniform circular disk with a mass of 101.0 kg and a radius of 1.1 m. It rotates with an angular velocity of 1183 rev/min. what is the tangential force
A person is standing 8 m away from a speaker and experiences an intensity level consistent with the standard pain threshold. what is the power of the speaker
A 6600 kilogram satellite is in a circular earth orbit that has a radius of 2.5 x 107 meter. Compute what work must the net external force do
What were the initial charges on the spheres? Since one is negative and you cannot tell which is positive or negative, there are two solutions.
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