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Demonstrates how the forces can vary in problems of 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 of the force that a concrete support exerts on the bridge (a) at the near end and (b) at the far end?
q1. a 28 kg loudspeaker is suspended 3.0 m below the ceiling by two cables that are each 64 degrees from vertical. what
Two objects of masses 10.0 kg and 5.00 kg are connected by a light string that passes over a frictionless pulley as in figure P4.20. The 5.00 kg object lies on a smooth incline of angle 40 degrees. Find out the acceleration of the 5.00 kg object ..
q1. calculate the threshold wavelength in nm of a metal if that metal emits an electron with a kinetic energy of 6.32
During a storm, a tree limb breaks off and comes to rest across a barbed wire fence at a point that is not in the middle between two fence posts. The limb exerts a downward force of 151 N on the wire. The left section of the wire makes an angle of..
how many electrons have been transferred. If a metric ton is 1.000 103 kg, how various 90 kg people can safely occupy an elevator that can hold a maximum mass of exactly 1 metric ton.
A harmonic wave moving in the positive x direction has an amplitude of 2.5 cm, a speed of 37.0 cm/s, and a wavelength of 54.0 cm. Assume that the displacement is zero at x = 0 and t = 0. Calculate the displacement due to the wave at x = 10.0 cm, t = ..
a spherical mirror is polished on both sides. when the concave side is used as a mirror the magnification is 1.7. what
A wire carrying a 32.0 A current passes between the poles of a strong magnet perpendicular to its field and experiences a 2.12 N force on the 4.00 cm of wire in the field. What is the average field strength
A 3.9 kg block of copper at a temperature of 70oC is dropped into a bucket containing a mixture of ice and water whose total mass is 1.2 kg, How much ice was in the bucket before the copper block was placed in it
A person is riding a bicycle, the wheels of a bicycle have an angular velocity of +20.5 rad/s. Then, the brakes are applied. In coming to rest, What is the angular acceleration of each wheel
A wire of radius one meter is centered on the origin in the xy plane. This wire carries a total charge of ?+Q. Another wire of length two meters runs along the z-axis and is centered at the origin.
A rock is dropped from a bridge to the water below. It takes 2.4 s to hit the water. Find the final speed of the rock when it hits the water. How high is the bridge above the water
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