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A 160-lb gymnast is executing a series of full-circle swings on the horizontal bar. In the position shown he has a small and negligible clockwise angular velocity and will maintain his body straight and rigid as he swings downward. Assuming that during the swing the centroidal radius of gyration of his body is 1.5 ft, determine his angular velocity and the force exerted on his hands after he has rotated through
(a) 90°,
(b) 180°.
A mass on a spring vibrates in simple harmonic motion at a frequency of 4.0 Hz and an amplitude of 8.0 cm. what is the displacement of the mass when t = 3.7s
Baseball and the Washington Monument On August 25, 1894, Chicago catcher William Schriver caught a baseball thrown from the top of the Washington Monument, What was the ball's direction of motion when caught
Transverse waves travel with a speed of 18 m/s in a string under tension of 5 N. What tension is required for a wave speed of 27 m/s in the same string.
A square with sides of length 2m is perpendicular to a magnetic field of strength 10 T, is rotated by 60 degrees in the course of 4s. What is the induced emf in the square
This parallel group is connected in series with a 22.0 Ω resistor. The total combination is connected across a 18.0 V battery. Compute the current delivered to the 130 Ω resistor.
A pulse travels on a string 8.0 m long and 12 g mass. If the tension in the string is 32 N, how long does it take the pulse to travel the length of the string
A block starts from rest at the top of a 35° inclined plane and encounters a spring, of constant 6.4 kN/m, rigidly attached to the plane. find the distance the block travelled before it encountered the spring
An alien civilization occupies a planet circling a brown dwarf, several light-years away. Find the difference between the highest and lowest frequencies
question1a car moves along a road in such a way that the distance x travelled in a time t is given byx a bt 3where a
Two point charges -90.0 mC and +40.0 mC, fixed on the x-axis, At what point along x-axis is the electric field zero
New physics student having trouble with hw, not sure how to set this up or find the answer. Throw a ball straight up with an initial vel. of 18.5m/s. if ball is caught at the same height it was released, and then compute the max. Height achieved b..
A meat baster consists of a squeeze bulb attached to a plastic tube. When the bulb is squeezed and released, find the absolute pressure PB in the bulb
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