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The ring of negligible size is subjected to a vertical force of 200 lb. Determine the longest length l of cord AC such that the tension acting in AC is 160 lb. Also, what is the force acting in cord AB? Hint: Use the equilibrium condition to determine the required angle for attachment, then determine l using trigonometry applied to ? ABC
A block M1 of mass 12.7 kg sits on top of a larger block M2 of mass 18.7 kg which sits on a flat surface. Find the magnitude of the acceleration of the upper block
A 64-kg man standing on a scale in an elevator notes that the elevator rises, the scale reads 827 N. What is the acceleration of the elevator
Consider a particular star which is not too different from our sun. Its radius is 8.50 108 m, and its total power output is 5.50 1026 W. calculate its surface temperature
The second-order fringe of 610 nm light is observed at an angle of 12° when the light falls on two narrow slits. at what angle would we expect it to be observed
Consider an athlete who jumps a horizontal distance of 9m after reaching a maximum height of 1.5m. What was the takeoff speed v0 of the athlete
A heat engine produces 9440 J. of heat while performing 2340 J. of useful work. What is the percent efficiency of this engine
a positive charge of q1 is located 5.50 m to the left of a negative charge -q2. the charges have different magnitudes.
Determine the Lorentz factor for the relative motions of the spaceship and earth-star system. How far away is the star system according to the astronaut just after initially reaching cruising speed. How long does the astronaut travel according to the..
A ball of mass 160 g is released from rest at a height of2.10 m above the floor and it rebounds straight up to a height of 0.900 m. Decide the magnitude of the ball's change in momentum due to its contact with the floor. If the contact time by the fl..
A slide projector produces an inverted image on a screen that is 30 times larger than the view on the slide. The lens has a focal length of 12.0 cm. compute (a) the distance of the screen from the lens and (b) the distance of the slide from the lens.
a 0.45 kg mass sliding on a horizontal frictionless surface is attached to one end of a horizontal spring with k 750
A sled is dragged along a horizontal path at a constant speed of v = 1.52 m/s by a rope that is inclined at an angle of ? = 30.3° with respect to the horizontal
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