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You perform a knee extension exercise on a cable type machine during which your knee joint rotates through an angular displacement of 0.85 radians in 4.35 second. At the beginning and end of that time the weight is motionless. That action, together with the various ratios in the machine causes a weight of 422 Newton to be lifted a total of 0.35 meter. Find your average knee torque during the lift?
A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. Find the speed of the wagon after the rock is thrown (a) directly forward in one case and (b) directly backward in another
An atomic nucleus initially movingat 420m/s emits an alpha particle in the direction of its velocity,and the remaining nucleus slows to 350 m/s. what speed does the alpha particle have when it is emitted
A particle with charge of 4 microcoloumbs is at the origin, another identical particle is placed 2 m from the origin on the positive x-axis and another 2 m on the positive y-axis. (1) Provide a sketch with vectors representing the forces on the ch..
a 50.0-m length of coaxial cable has an inner conductor that has a diameter of 2.58 mm and carries a charge of 8.10
A 6 µF capacitor carries a charge of 20 µC. If it is connected in a loop with a 5 ? resistor, what is the energy stored in the capacitor 8 µs after the connection is made
Suppose that you wish to fabricate a uniform wire out of 1.00 g of copper. Assume the wire has a resistance R = 0.700 %u03A9, What will be the length of the wire
A loop of wire with cross-sectional area 1 m2 is inserted into a uniform magnetic field with initial strength 2 T. Find the magnitude of the induced EMF in loop of wire
A glass rod that has been charged to + 17.0nC touches a metal sphere. Afterward, the rod's charge is + 9.0nC
A pulley hanging off the side of a building supports a 0.57 kg bucket on a rope. The pulley releases rope as the bucket is lowered to the ground. What is the distance to ground
A proton accelerates from rest in a uniform electric field of 644 N/C. At some later time, its speed is 1.14 106 m/s. Find the magnitude of the acceleration of the proton
Illustrate energy bar graphs to solve the problem . What is amplitude of the oscillations.
A window washer is standing on a scaffold supported by a vertical rope at each end. The scaffold weighs 204 N and is 3.1 m long. What is the tension in each rope when the 702-N worker stands 2.10 m from one end?
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