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The person illustrated below is performing an exercise to build shoulder strength. We need to get an estimate of the moment created by the weight W about his shoulder joint.The length of the upper arm is "a, the length of the forearm is "b",and the weight of the dumbell "W". The weight of the arm is neglected.
A spring-block system executes simple harmonic motion. The mass of the block is m = 12 kg and the total energy is E = 18 J. The amplitude is A = 0:10 m.
Two capacitors (C1 = 4.00 µF and C2 = 16.0 µF) are now connected in series and to a 9.00-V battery. Find the equivalent capacitance of the combination
A long, straight wire carries a current of 4 A to the right. Next to the wire is a square loop with sides 1.0 m in length. Calculate the magnitude of the net force acting on the loop
A 5.65 kg object is released from rest while fully submerged in a liquid. The liquid displaced by the submerged object has a mass of 2.5 kg. How far and in what direction does the object move in 0.200 s, assuming that it moves freely and that the ..
A permanent magnet is hung from a string ( balanced ) and pointed in an East - West orientation and released. Describe its motion
On another planet the simple pendulum consisting of a 0.154 kg mass suspended on a 1.20 m long string has a period of 3.860 seconds. What is acceleration on this planet.
a shot putter threw a shot-put with a speed of 13.4 m/s at an angle of 43 above the horizontal. How far did the shot-put travel in the horizontal direction
Why do power companies use low currents in power lines when transferring electrical energy over large distances? Because power lines have resistance and resistors transform electrical energy into thermal energy. High currents would require larger p..
A covex lens of focal length 10 cm placed 40 cm in front of aconcave lens of focal length 25 cm.A small object is placed 20 cmin front of the convex lens calculate the location of the finalimage relative to the second lens. Include a ray diagram
An athlete swims the length L of a pool in a time t1 and makes the return trip to the starting poisition in a time t2. (a) If she is swimming initially in the positive x-direction, determine her average velocities symbolically in (a) the first hal..
a piston of mass 4.53kg is travelling in a tube with a velocity of 15.24ms. it engages a spring of stiffness 350 ncm
Two capacitors, C 1 = 20.0 µF and C 2 = 38.0 µF, are connected in series, and a 18.0 V battery is connected across them.- total energy stored ? Find the energy stored in each individual capacitor- energy stored in C1 ?
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