A solid sphere, a solid cylinder, a spherical shell, and a hoop all have the same mass and radius. Each are rolling on a horizontal surface with the same center of mass speed, and then they roll up identical inclines. Which one goes the greatest distance up its incline?
a. the hoop
b. the solid sphere
c. the spherical shell
d. the cylinder
e. They all go the same distance up their inclines.
A
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A car starting from rest accelerates at a constant 2.0 m/s2 for 10 s. It then travels with constant speed it has achieved for another 10 s. Then it finally slows to a stop with constant acceleration of magnitude 2.0 m/s2
How far does it travel after starting? A) 200 m B) 400 m C) 500 m D) 300 m
A green light ray in air enters water with n = 1.333. What is the color of the light in the water?
1.blue 2.almost orange 3.ultraviolet 4.green
A particle confined to motion along the x axis moves with constant acceleration from x = 2.0 m to x = 8.0 m during a 2.5-s time interval. The velocity of the particle at x = 8.0 m is 2.8 m/s. What is the acceleration during this time interval?
a. 0.48 m/s2 b. 0.32 m/s2 c. 0.64 m/s2 d. 0.80 m/s2 e. 0.57 m/s2
Which of the following is not a possible solution to the question of why we have not yet found evidence of other civilizations?
A) We are the only intelligent civilization to have ever arisen in the Milky Way. B) Of all of the intelligent civilizations in the Milky Way, none has chosen to create a galactic civilization. C) There is a galactic civilization, but we are currently unable to detect or recognize it. D) There is a galactic civilization, but it is being actively hidden from us. E) Given the current age of our galaxy, there has not been enough time for a galactic civilization to develop.