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Using your knowledge of statics, discuss briefly why the magnitude and direction of the knee reaction force varies with the amount of lower leg flexion and the amount of added weight.
Two ice skaters, with masses of 50.0kg and 85.0kg , are at the center of a 40.0m -diameter circular rink. The skaters push off against each other and glide to opposite edges of the rink.If the heavier skater reaches the edge in 40.0s , how long does ..
A 35-turn circular coil of wire has a diameter of 0.57 m. find the strength of the average emf generated in the coil
A railroad locomotive with a mass of can exert a force of. At what rate can it accelerate when pulling a train
A particle with a charge of ? 5.00nC is moving in a uniform magnetic field of B? =?( 1.23T )k^, Calculate the x component of the velocity of the particle
An inductor, a capacitor, and a 64.0-? resistor are connected in series with an AC generator; the generator produces an RMS voltage of 90 V. what is the average power output of the generator
A 73 trampoline artist jumps vertically upward from the top of a platform with a speed of 4.0. If the trampoline behaves like a spring of spring constant 6.2×104, how far does he depress it.
A student sits on a swivel seat. Initially the student is at rest, holding a spinning bicycle wheel that has an angular velocity of 10.2 rad/s (see figure below). The student turns the spinning wheel upside down, reversing the direction of its angula..
A heat pipe is a device developed by NASA for efficiently transmitting thermal energy while in space. A heat pipe is to be constructed using a rigid pipe with a volume of 0.0002·m3, What is the specific and total internal energy of the water
Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber. what is the length (in m) of the fiber
A projectile is launched from a 300 m high cliff at an angle of 30 degree with an initial velocity of 150 m/s. (g=9.8m/s^2). Begin by drawing a diagram and determine: a) The total time of the flight b) The horizontal velocity of the rocket on impa..
A uniform .20-kN board of length L has two objects hanging from it : 300N at exactly L/3 from one end, What torques are being exerted on the board
One of the 57.5cm -long strings of an ordinary guitar is tuned to produce the note B3(frequency 245 Hz) when vibrating in its fundamental mode. Find the speed of transverse waves on this string
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