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A steel wire of length 1.92 with circular cross section must stretch no more than 0.300 when a tensile (stretching) force of 410 is applied to each end of the wire. What minimum diameter is required for the wire? Express your answer in millimeters. Take Young's modulus for steel to be = 2.00×1011.
A baseball pitcher throws a fastball at a speed of 45.00m/s. The acceleration occurs as the pitcher holds the ball in his hand and moves it throughout an almost straight-line distance of 4.0 m. compute the acceleration; assume that it is constant ..
a 30kg child wants to use a 20kg board that is 6.0m long as a seesaw. since all her friends are busy, How far from her will the support be
A child's toy consists of a piece of plastic attached to a spring in the figure below. The spring is compressed against the floor a distance of 2.00 cm, estimate the force constant of the spring
A spring of negligible mass stretches 3.00 cm from its relaxed length when a force of 7.70 N is applied. A 0.490-kg particle rests on a frictionless horizontal surface, What is the amplitude of the motion
A distant galaxy is simultaneously rotating and receding from the earth. As drawing shows, the galactic center is receding from the earth at a relative speed of uG = 1.8 x 10^6 m/s.
Two 0.80g spheres are charged equally and placed 2.0cm apart. When released, they begin to accelerate at 160m/s^2. What is the magnitude of the charge on each sphere?
A charge of +q is located at the origin, while an identical charge is located on the x axis at x = 0.49 m. Where should the third charge be located?
A small rubber wheel is used to drive a large pottery wheel, and they are mounted so that their circular edges touch. Calculate the angular acceleration of the pottery wheel
A stone is projected at a cliff of height h with an initial speed of 45.0 m/s directed at an angle θ0 = 66.0° above the horizontal. The stone strikes at A, 5.37 s after launching. Find out (a) height h of the cliff, (b) speed of the stone just before..
Two bullets from opposite sides collide in midair during battle. What fraction of the original kinetic energy was lost in the collision
A 1 kg mass (initially at rest) compresses a spring (spring constant 2500 N/m) by 0.2 m, and is released. What is the maximum height achieved by the two masses
A mass m = 6.3 kg hangs on the end of a massless rope L = 1.98 m long. The pendulum is held horizontal and released from rest. How fast is the mass moving at the bottom of its path
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