You and your friend, who has the same mass as you, want to go to the top of the Eiffel Tower. Your friend takes the elevator straight up. You decide to walk up the spiral stairway, taking longer to do so
Compare the gravitational potential energy of the system you-Earth and your friend-Earth, after you both reach the top. A) It is impossible to tell, since the times you both took are unknown.
B) It is impossible to tell, since the distances you both traveled are unknown.
C) The friend-Earth system's gravitational potential energy is greater than the you-Earth system's gravitational potential energy, because he got to the top faster.
D) Both systems have the same amount of gravitational potential energy at the top.
E) The you-Earth system's gravitational potential energy is greater than the friend-Earth system, because you traveled a greater distance in getting to the top.
D
You might also like to view...
?An object is placed a distance y0=?2f in front of a concave mirror of focal length f that is located at y = 0. An identical object is placed a distance ?y'0 = ?2f in front of a convex mirror of focal length?f that is located at y' = 0. The difference between the two image positions, yi ? y'i, is
A. ?f /2. B. ?f. C. ?4f /3. D. ?2f. E. ?8?f? /3.
Many Earth-based telescopes are larger than the Hubble Space Telescope, so what justifies the great expense of a "space-based" instrument?
What will be an ideal response?
Two tiny particles having charges of +7.00 ?C and -9.00 ?C are placed along the y-axis. The +7.00-µC particle is at y = 0.00 cm,
and the other particle is at y = 40.00 cm. Where must a third charged particle be placed along the y-axis so that it does not experience any net electric force due to the other two particles? A) 0.200 m B) 2.99 m C) -0.187 m D) -2.99 m E) 0.187 m
A 30-year-old woman takes a trip on a rocket, leaving her 20-year-old brother behind. She travels at a speed of 0.8 c, and is gone 20 years, according to the younger brother. When she returns, how many years older/younger is she than her brother?
a. 2 years younger b. 2 years older c. 3 years older d. 10 years older e. 8 years older