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The figure shows a lower leg being exercised. It has a 49-Nweight attached to the foot and is extended at an angle with respect to the vertical. Consider arotational axis at the knee, as indicated. (a)When = 83°, find the magnitude of thetorque that the weight creates. (b) At what angle does the magnitude of the torque have avalue of 11 N·m?
how much work is required to turn an electric dipole 180deg in a uniform electric field of magnitude e 42.0 nc if p
suppose the original experiment is done on the Moon, where g, the acceleration due to gravity, is about one-sixth of g on Earth. If the magnet is dropped from height H, how will the graph compare to the original graph
An 85 kg jogger is heading due east at a speed of 1.6 m/s. A 55 kg jogger is heading 34° north of east at a speed of 3.6 m/s. compute the direction of the sum of momenta of two joggers
a helium nucleus charge 2e moves through a potential difference v -0.60 kv. its initial kinetic energy is 2.90x10-16
A large tank is filled with methane gas at a concentration of 0.585 kg/m3 The valve of a 1.38-m pipe connecting the tank to the atmosphere is inadvertently left open for fourteen hours. What is the cross-sectional area of the pipe
a helicopter lifts a 72kg astronaut 15m vertically from the ocean from rest by means of a cable. the acceleration of
q1. a simple harmonic oscillator consists of a block of mass 1.80 kg attached to a spring of spring constant 107 nm.
A solenoid 88.0 cm long has a radius of 2.60 cm and a winding of 2000 turns; it carries a current of 3.60 A. Calculate the magnetic field outside the solenoid
question1a truck is carrying a steel beam of length 17.0 m on a freeway. an accident causes a beam to be dumped off the
A vertical spring has one end attached to the ceiling and a 2.50 kg weight attached to the other one. find how fast the weight is moving
The distance between two telephone poles is d = 53.5 m. When a 1.10-kg bird lands on the telephone wire midway between the poles, how much tension does the bird produce in the wire
The train comes to a stop 6.0 m from the point at which it was released. What is the magnitude of train's acceleration after its wheel begins to stick.
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