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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 a rotational axis at the knee, as indicated. (a) When =89°, find the magnitude of the torque that the weight creates.(b) At what angle does the magnitude of the torque have a value of 15 N·m?
a jogger runs with a speed of 3.25 m s i. a direction. of 30.0 degrees above the x axisa. find the x and y components.
The helicopter view in the figure below shows two people pulling on a stubborn mule. What is the single equivalent force magnitude and direction
A novice skier, starting from rest, slides down a frictionless 35 degree incline whose vertical height is 185m. How fast is she going when she reaches the bottom.
A straight 2.00-m, 150-g wire carries a current in a region where the earth's magnetic field is horizontal with a magnitude of 0.55 gauss. a) What is the minimum value of the current in this wire so that its weight is completely supported by the m..
the inside of a room is to be maintained at 20 degrees celsius while the outside temperature is -10 degrees celsius.
a certain ball has the property that each time it falls from a height onto a hard level surface it rebounds to a height
A capacitor (capacitance C1) is connected across the terminals of an ac generator. Without changing the voltage or frequency of the generator, a second capacitor (capacitance C2) is added in series with the first one.
A car traveling 51.9 km/h is 26.2 m from a barrier when the driver slams on the brakes. The car hits the barrier 2.84 s later. How fast is the car traveling at impact
At a certain point in a pipeline the liquid speed is 8 m/s and the gauge pressure is 7x10^4 Pa. Find the gauge pressure at the second point at a level 10 meters lower than at the first if a cross-sectional area is 10cm squared at the first point a..
Considering the equation for heat transfer through a wall, describe two simple ways to modify ahome to decrease the rate at which heat is lost through the walls.
A lead ball weighing 10 N falls 0.8 m from rest into a bucket of sand. The ball stops after making a crater 0.2 m deep. According to the work-energy theorem the work done by the sand on the ball in bringing it to rest is...?
The current in a 69-? resistor is 0.15 A. This resistor is in series with a 37-? resistor, and the series combination is connected across a battery. What is the battery voltage
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