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A helicopter moves in such a way that its position at any time is described by the horizontal and vertical equations x = 5t + 12t2 and y = 10 + 2t + 6t2 , where x and y are in meters and t is in seconds.
(a) What is the initial position of the helicopter at time t = 0?
(b) What are the x and y components of the helicopter's acceleration at 3 seconds?
(c) What is the speed of the helicopter at 4 seconds?
A loudspeaker of mass 18.00 {rm kg} is suspended a distance of h = 1.20 {rm m} below the ceiling by two cables that make equal angles with the ceiling.
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You operate a small grain elevator near Champaign, Illinois. What is the power provided by the electric motor powering the bucket elevator when the bucket elevator ascends with a full load at a speed of 2.2 m/s
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A 20.0-N block rests on a horizontal surface. The coefficients of static and kinetic friction between the surface, What is the force of friction acting on the block
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in a marathon race chad is out in front running due north at a speed of 3.93 ms. john is 95 m behind him running due
A space vehicle is traveling at 4300 km/h relative to the Earth when the exhausted rocket motor is disengaged, find the speed of the command module relative to Earth
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