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A person lifts a 100 Newton dumbbell by pulling upward with his biceps. The biceps are attached to the arm bone 1.5 cm from the elbow. The 100 N weight is 30 cm from the elbow. The forearm has a weight of 40 N and a center mass of 14 cm from the elbow. Assume all the angles are square for this problem. How much force is required to lift the elbow and the forearm?
a string with a mass of 27 g and a length of 2 m is stretched under a tension of 68 n. how much power must be supplied
a 17.0-n block rests on a horizontal surface. the coefficients of static and kinetic friction between the surface and
The magnitude of the initial acceleration of the electron is correct
The largest and smallest slits in these experiments are 0.16mm and 0.04mm wide, respectively. How many wavelengths wide are these slits
At a steady state, a well-insulated compressor takes in air at 60 degrees Fahrenheit, 14.2 lbf/in^2, Determine the compressor power
A plane flying horizontally at a speed of 50.0 m/s and at an elevation of 160 m drops a package. How far apart will the two packages land on the ground (ignore air resistance)
A parallel-plate capacitor is formed from two 5.9cm-diameter electrodes spaced 1.0mm apart. The electric field strength inside the capacitor is 3.0×106 N/C. What is the charge (in nC) on each electrode
a juggler traveling in a train on level track throws a ball straight up relative to the train with a speed of 6.40 ms.
two point charges are on the y-axis. a 5.0 microc charge is located at y 1.15 cm and a -2.32 microc charge is located
A 5.00 kg sack of flour is liftedvertically at a constant speed of 4.00 m/s through a height of13.0 m. How much work is done on the sack by the lifting force
A 2 g lead (cp = 128 J/kg•°C) bullet travelling at 325m/s is stopped by the large tree. If half the kinetic energy of the bullet is transformed into internal energy and remains with the bullet whereas the other half is transmitted to the tree, wha..
A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 9.20 m/s at an angle of 15.0° below the horizontal. How far horizontally from the base of the building does the ball strike the ground
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