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Illustrates how the forces can vary in problemsof this type. A hiker, who weighs 857 N, is strolling through the woods and crosses a small horizontal bridge. The bridge is uniform,weighs 4420 N, and rests on two concrete supports, one on each end. He stops 1/5 of the way along the bridge. What is the magnitude ofthe force that a concrete support exerts on the bridge(a) at the near end and (b) atthe far end?
a wooden speaker with a mass of 12.57 kg is attached to a light spring with a spring constant of 145 nm. the system is
You somehow manage to get a gold ring with inner diameter 2.19 cm stuck on your finger, even though your knuckle has a diameter of 2.2 cm. To what temperature would you have to heat the ring
A 0.170-A current is charging a capacitor that has circular plates 15.0 cm in radius. The plate separation is 4.00 mm. What is the time rate of increase of electric field between the plates
Consider the following pipe assembly containing a permeable filter of length L=20cm, area A=20cm^2, and permeability of 4 millidarcys. what is the velocity of the flow through the filter section
A flywheel comprises a uniform circular disk with a mass of 99.0 kg and a radius of 1.0 m. It rotates with an angular velocity of 1472 rev/min. what is the tangential force
An 80.0-m-long brass rod is struck at one end. A person at the other end hears two sounds as a result of two longitudinal waves, What is the time interval between the two sounds
It is common to see birds of prey rising upward on thermals. The paths they take may be spiral-like. Find the direction of the bird's acceleration
A child slides down a snow covered slope that makes an angle of 20 degrees with the horizontal. At what angle would the child slide with constant speed
Compute the semi major axis of the star orbit
Suppose that 15% of the volume of the average human body is contained in the head. What would the average person's density have to be
A 500g mass on a string oscillates as a pendulum. The pendulum's energy decays to 50% of its initial value in 30s. What is the value of the damping constant
An EM wave has a wave vector k=(x+2y)rad/m. The magnetic field amplitude is Bo=(1.43x10^-10T)(2x-y+z). Determine the electric field vector amplitude
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