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Imagine the motion of the human forearm in throwing a dart. Because of the force M applied by the triceps muscle, the forearm can rotate regarding an axis at the elbow joint. Suppose that the forearm has the dimensions 0.28m from axis of elbow to dart pin and 0.025m from axis of elbow to muscle. The moment of inertia is 0.065kg/m2 (including the effect of the dart)relative to the axis at the elbow. Suppose also that the force M acts perpendicular to the forearm. Ignoring the effect of gravity and any frictional forces, Decide the magnitude of the force M needed to give the dart tangential speed of 5.0 m/s in 0.10s, starting from rest.
what is the number density of copper? atomsm3nbspwhat is the number density of magnesium?
A proton is projected in the positive x direction into a region of uniform electric field Earrowbold = (-5.40 multiplied by 105) i hat bold N/C at t = 0. Determine the acceleration of the proton
In a Compton scattering experiment, the scattered electron is observed to move in the same direction, what is the scattering angle of the photon
Two waves traveling on a string in the same direction both have a frequency of 141 Hz, a wavelength of .43 m, and an amplitude of .16 m. What is the phase difference between the two waves
A red race car is traveling side by side a blue race car at aconstant speed of 130km/h. At this point the blue car decides tostop in the pits for a tire change. How far behind the red car was the blue car
A projectile of mass 2.0 kg approaches a stationary target body at 5.0 m/s. find the magnitude of the momentum of the target body
When an electric heater is turned on, the Nichrome heating element is at 0° C and draws a current of 15 A, with a potential difference of 120 V between the ends of the element. The element heats up to 797° C, with the potential difference constant..
A uniform electric field of magnitude 400V/m is directed in the positive x-direction. A10 µC charge moves from the origin to the point (x, y) = (20 cm, 50 cm). What was the change in the potential energy of this charge?
a student slides her 80.0-kg desk across the level floor of her dormitory room a distance 2.00 m at constant speed. if
A train is travelling up a 4.5 degree incline at a speed of 3.25 m/s when the last car breaks free and begins to coast without friction. a) How long does it take for the last car to come to rest momentarily? b) How far did the last car travel befo..
A passenger walks from one side of a ferry to the other as it approaches a dock. what are the direction and magnitude of the ferry's velocity relative to the water
During liftoff, a hot-air balloon accelerates upward at a rate of 3.4 . The balloonist drops an object over the side of the gondola when the speed is 17, How long does it take to hit the ground
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