Determine velocity of platform immediately after the leap
A 70 kg boy stands on the edge of a stationary 100 kg platform; the platform is on frictionless rollers. Suddenly he leaps with a velocity of 4 m/s from and parallel to the platform. Determine the velocity of the platform immediately after the leap.
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The mechanical effficiency of the system is 80%. What is the average power input in Watts necessary to accomplish this? Assume constant velocity.
Suppose we observe the number of wafers that are defective with samples of wafers of size 5. We observe the following data
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A tow truck is pulling a car out of a ditch by means of a steel cable (Y = 2.0 x 1011 N/m2) that is 8.87 m long and has a radius of 0.462 cm. When the car just begins to move, the tension in the cable is 886 N. How much has the cable stretched?
Suddenly he leaps with a velocity of 4 m/s from and parallel to the platform. Determine the velocity of the platform immediately after the leap.
You want to compare the reliability of two machines that insert chips onto electronic cards. The main problem is the occurrence of jams in the feeding mechanism, as this requires stopping production to fix the trouble. To this aim you observe the
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(a) What is the spring constant of the spring? (b) Find the angular frequency of the block's vibrations.
(a) What is the angular frequency of the motion? (b) Using the position of the bob at its lowest point as the reference level, determine the total mechanical energy of the pendulum as it swings back and forth. (c) What is the bob's speed as it pas
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