The frictional force of the floor on a large suitcase is least when the suitcase is
a. pushed by a force parallel to the floor.
b. dragged by a force parallel to the floor.
c. pulled by a force directed at an angle ? above the floor.
d. pushed by a force directed at an angle ? into the floor.
e. turned on its side and pushed by a force parallel to the floor.
c
You might also like to view...
Energy in Capacitors: An air-filled 20-?F capacitor has a charge of 60 ?C on its plates. How much energy is stored in this capacitor?
A. 70 ?J B. 80 ?J C. 90 ?J D. 100 ?J E. 110 ?J
Which of the following lists the two key predictions of the Big Bang model that have been verified by observations?
A) (1) the existence of the cosmic microwave background and (2) the amount of helium relative to hydrogen in the universe B) (1) the existence of the cosmic microwave background and (2) the existence of dark matter C) (1) the existence of the cosmic microwave background and (2) the near-critical density of the universe D) (1) the predominance of matter over antimatter and (2) the near-critical density of the universe E) (1) the predominance of matter over antimatter and (2) the large-scale structure of galaxies
In any collision
A. total momentum is not conserved. B. total kinetic energy is conserved. C. total momentum is conserved. D. total momentum is not conserved but total kinetic energy is conserved. E. total momentum and total kinetic energy are conserved and the masses are equal.
Kepler's Laws: The planet Jupiter is 7.78 × 1011 m from the sun. How long does it take for Jupiter to orbit once about the sun given that the distance from the earth to the sun is 1.50 × 1011 m?
A. 2.3 years B. 5.2 years C. 6.0 years D. 12 years E. 27 years