Two identical ladders are 3.0 m long and weigh 600 N each. They are connected by a hinge at the top and are held together by a horizontal rope, 1.0 m above the smooth floor forming a symmetric A arrangement.
The angle between the ladders is 60 and both ladders have their center of gravity at their midpoint. What is the tension in the rope? A) 240 N
B) 300 N
C) 220 N
D) 260 N
E) 280 N
Question 2
An object drops a distance h in a time of 6.3 s on the surface of the earth (neglecting air effects).
How long would it take the same object to drop the same distance on the surface of spherical asteroid X having a mass of 1.1 1022 kg and a radius of 4.0 105 m? (G = 6.67 10-11 N m2/kg2,
Mearth = 5.97 1024 kg, Rearth = 6.38 106 m)
A) 9.2 s
B) 6.3 s
C) 5.2 s
D) 12 s
E) 3.3 s
Long-day stimulation of flower development in Arabidopsis.
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