As a 3.0-kg bucket is being lowered into a 10-m deep well, starting from the top, the tension in the rope is 19.6 N. The acceleration of the bucket will be:
a. 6.5 m/s2 downward. c. zero.
b. 9.8 m/s2 upward. d. 3.3 m/s2 downward.
D
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The angle of rotation between the ends of a nylon bar is 3.58. The bar diameter is 70 mm and the allowable shear strain is 0.014 rad. The minimum permissible length of the bar is approximately:
(A) 0.15 m
(B) 0.27 m
(C) 0.40 m
(D) 0.55 m
The elements in the periodic table which lack one electron from a filled shell are referred to as
A) noble gases. B) halogens. C) alkali metals. D) transition elements. E) none of the above.
In GUTs, the electromagnetic force and weak nuclear force were the first to separate; then came gravity
Indicate whether the statement is true or false
You carry a 7.0 kg bag of groceries 1.2 m above the level floor at a constant velocity of 75 cm/s across a room that is 2.3 m room. How much work do you do on the bag in the process?
A) 0.0 J B) 82 J C) 158 J D) 134 J