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A soccer player extends her lower leg in a kicking motion by exerting a force with the muscle above the knee in the front of her leg. She produces an angular acceleration of 30.0 rad/s2 and her lower leg has a moment of inertia of 0.750 kg·m2. What is the force exerted by the muscle if its effective perpendicular lever arm is2.00 cm?
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The downward acceleration of a 74-kg stuntwoman near the end of a fall from a very high building is 5.5m/s2
irplane A , starting from rest with constant acceleration, requires a runway 600m long to become airborne. How long must the runway be for airplane B
What would be the time constant in a RC circuit when R = 200 kohms and C = 10mf? 20
a parcel of land held by the partnership as an investment (basis $3,000), and equipment with a basis of $6,000. Illustrate what is her basis in the land and equipment?
A sphere of radius R has a charge Q. The electric field strength at a distance r > R is Ei. What is the ratio Ef/Ei of the final to first electric field strength if Q is halved.
Suppose you want a capacitor bank with a total capacitance of 1.450 F and you possess numerous 2.50 mF capacitors. What is the smallest number you could hook together to achieve your goal
Plane monochromatic waves with wavelength 520 nm are incident normally on a plane transmission grating having 350 slits/mm
Consider an optical gain medium that has two levels at E 1=1.50 eV and E 2=3.50 eV. What is the stimulated emission wavelength
A solid disk (r=0.20 m, M=0.50 kg) is suspended fro the end of an L=0.30m long rod (m=0.30 kg, cross-sectional area of 2.0 cm^2). WHAT IS THE PENDULUM'S PERIOD FOR SMALL ANGLE OSCILLATIONS
A 0.290-kg block along a horizontal track has a speed of 1.60 m/s, What is the spring's maximum compression if the track is frictionless
What is the internal resistance of a 12.0-V car battery whose terminal voltage drops to 9.5V when the starter motor draws 77A
A 34.7 m long aluminum wire at a temperature of 24.3 oC has a radius of 0.295 mm. determine the current in the wire
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