A stone is moving on a rough level surface. It has 24 J of kinetic energy, and the friction force on it is a constant 0.50 N. What is the maximum distance it can slide?
A) 2.0 m
B) 12 m
C) 24 m
D) 48 m
D
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An airplane flying horizontally at a speed of 50.0 m/s and an elevation of 160 m drops a package. Two seconds later it drops a second package. How far apart will the two packages land?
A. 100 m B. 162 m C. 183 m D. 269 m
In an engine operating in the Otto cycle, the final volume of the fuel-air mixture is one sixth the initial volume. Assume ? = 1.4. The maximum theoretical efficiency of this cycle is
A. 17%. B. 49%. C. 51%. D. 56%. E. 83%.
Both rolling resistance and drag increase with increasing speed as the square of the speed
What will be an ideal response?
A charge Q accumulates on the hollow metallic dome, of radius R, of a Van de Graaff generator. A probe measures the electric field strength at various points outside the sphere surface. If the probe is initially at a distance 3R from the sphere's center and then is moved to 5R, by what factor will the electric field reading change?
a. 3/5 c. 5/3 b. (5/3)2 d. (3/5)2