A bulldozer attempts to drag a log weighing 500 N along the rough horizontal ground. The cable attached to the log makes an angle of 30° above the ground. The coefficient of static friction between the log and the ground is 0
50, and the coefficient of kinetic friction is 0.35. What minimum tension is required in the cable in order for the log to begin to slide?
220 N
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Put the major layers of Earth's atmosphere in to the correct order from the ground upward. Drag the layers into place in the correct order from lowest altitude at left to highest altitude at right.
Buoyancy: A piece of iron rests on top of a piece of wood floating in a bathtub. If the iron is removed from the wood, and kept out of the water, what happens to the water level in the tub?
A. It goes up. B. It goes down. C. It does not change. D. It is impossible to determine from the information given.
In organic molecules, a bromine atom will normally form how many bonds?
a. 2 b. 3 c. 4 d. 1 e. 0
Planet A has twice the mass of Planet B. From this information, what can we conclude about the acceleration due to gravity at the surface of Planet A compared to that at the surface of Planet B?
A) The acceleration due to gravity on Planet A is greater than the acceleration due to gravity on Planet B, but we cannot say how much greater. B) The acceleration due to gravity on Planet A must be four times as great as the acceleration due to gravity on Planet B. C) The acceleration due to gravity on Planet A must be twice as great as the acceleration due to gravity on Planet B. D) The acceleration due to gravity on Planet A is the same as the acceleration due to gravity on Planet B. E) We cannot conclude anything about the acceleration due to gravity on Planet A without knowing the radii of the two planets.