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Three vectors have the same magnitude of 18 units. They make angles of ?, 2 times ? and 3 times ? with respect to the x axis, where ? = 14 o.
A. What is the magnitude of their vector sum?
B. What is the x-component of their vector sum?
C. What is the y-component of their vector sum?
A string under a tension of 47.00N is used to whirl a rock in a horizontal circle of radius 2.60 m at a speed of 21.0 m/s. The string is pulled in and the speed of the rock increases.
Suppose manufactures increase in size of compact disks. By what factor will the moment of inertia increase
A dragster starts from rest and accelerates down a track. Each tire has a radius of 0.320 m and rolls without slipping. determine the linear speed of the dragster
A string trimmer is a tool for cutting grass and weeds; it utilizes a length of nylon "string" that rotates about an axis perpendicular to one end of the string. What is the length of the rotating string
A 5.0-kg projectile is fired over level ground with a velocity of 200.0 m/s at an angle of 30.0 degg above the horizontal. Over the entire trip the work done by the air forces is
Two people, one at each end of a uniform beam that weighs 400N hold the beam at an angle of 25 degrees to the horizontal
A 88 g cube of ice at 0°C is dropped into 1.0 kg of water that was originally at 76°C. What is the final temperature of the water after the ice has melted
A ball, initially at y = 0, is thrown straight down and takes 1.40 s to move 13.8 m in the - y direction. Calculate the initial velocity of the ball
A boy throws a 1.5 kg rock upward. To do so the boy applies a constant 38.5 N force upwards on the rock from point a to point b. after that the rock continues upward to its highest height at point c.
explain the shape of the distribution of sample means.
A sphere of mass 2.8 kg is suspended from a cord. A steady horizontal breeze pushes the sphere so that the cord makes an angle of 40° with vertical when at rest.
Drag race tires in contact with an asphalt surface have an extremely high coefficient of static friction. Assuming a constant acceleration and no slipping of tires, estimation the coefficient of static friction needed for a drag racer to cover 1.0 km..
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