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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.
An astronaut orbiting the Earth is preparing to dock with a Westar VI satellite, Determine the speed of the satellite
Consider a heat engine that operates between thermal reservoirs at 510 K and 242 K. Suppose the engine does 4900 J of work while it expels 103 J of energy to the cold reservoir. Is this engine possible in the real world? Hint: Violations of the secon..
A 13.1 k? resistor and a capacitor are connected in series and then a 12.0 V potential difference is suddenly applied across them, Calculate the time constant of the circuit
q1. an ideal gas undergoes the process agtbgtcgta which is a right triangle with agtb being the hypotenuse bgtc being
A weight (with a mass of 90 kg) is suspended from the point near the right-hand end of a uniform boom with a mass of 71kg. To support the uniform boom a cable runs from this same point to a wall (the left-hand vertical coordinate) and by a pivot on t..
A series RLC circuit has components with the following values: L = 18.0 mH, C = 90.0 nF, R = 10.0 ?, and ?Vmax = 100 V, with ?v = ?Vmax sin ?t. Find the resonant frequency of the circuit
A 6 m long, uniform ladder leans against a frictionless wall and makes an angle of 67.3 with the floor. The ladder has a mass 21 kg. A 54.6 kg man climbs 82% of the way to the top of the ladder when it slips and falls to the floor.
A 63 ohms resistor, an 8.4 uF capacitor, and a 36 mH inductor are connected in series in an ac circuit. Calculate the impedance for a source frequency of 300Hz
a slide projector needs to create a 98-cm-high image of a 2.0 cm slide. the screen is 300 cm from the slide. what focal
A high diver of mass 70kg jumps off a board 10 meters above the water. what average upward force did the water exert on the on the diver
If the separation between the two plates is double the value calculated in part (a), what potential difference is required for the capacitor to store charge of magnitude 260 pC on each plate
The weight of passengers on a roller coaster increases by 51 percent as the car goes through a dip with a 39 radius of curvature.What is the car's speed at the bottom of the dip.
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