53j ride a freely-falling runaway elevator, your A) becoloration is zero D) gravitational Interaction with Carth la runs. C wright is zero Dj all of the above (Ej inone of the above 54) Planets wobble in their orbits due to Aj uncertainties In the inverse-square law. Bj the gravitational attraction to other planets. C elliptical-orbit quirks. Dj all of the above E) mone of the above 55) A weight watcher who normally weighs 400 N stands on top of a very tall ladder so she is one Earth rad un above Earth's surface. How much is har weight there? A) 180 N 9 40 N DJ XON E) inone of the above 58) if an object is placed exactly halfway between Earth and the Moon, it would fall toward the A) Earth. B) Moon. 9 neither of these 57) There would be only one ocean fide por 24-hour day if the A) Earth and Moon were equally massive. B) Moon's mais were small - only a few kilograms. C) Sun's Influence on the tides were negligible. [Dj Moon ware more makive than Earth. Ej inone of the above 58) Tidal forces In general are the result of A) a combination of any kind of forces acting on a body. Bj two or more sources off gravitation. C the inverse-square Low. [Dj unequal fluid flow. [E) unequal forces acting on different parts of a body. (50) What is the force of gravity on a 500-IN woman standing on Earth's surface? Aj SON D) 250 N E) inone of the above 50) The force of Earth's gravity on a capsule in space increases in it comes closer. When the capsule move to half its distance, the force toward Earth is than A) four times greater. B three times greater. 9 twice Of none of the above61) When a star collapses to form a black hole, its mass 630 Earth's gravitational field extends Aj only above and beyond Earth's surface and cancels inside Earth Bj both inside and outside Earth and throughout the entire universe. C neither of these 63) if the Moon had twice as much mass and still orbits Earth at the same distance, ocean bulges on Earth would be Aj Linger. Bj unequal in size C smaller. [Dj not significantly different. (E) mone of the above 64) Newton discovered Aj that gravity is universal By gravity. C neither of these 65) If the Moon ware four times as massive but twice as far from Earth, high tides on Earth would be Aj no different. BJ lower. higher. 68) The direction of a gravitational field is Aj In the same direction as gravitational attraction. Bj opposite to the direction of gravitational attraction. Go awry from the center of gravity of an object 67) A lunar month is about 20 days. If the Moon ware closer to Earth than it is now, the lunar month would be Aj about 18 days. B Las than A dra. more than 2 days. Do need more information 680 it there were ino gravity a stone thrown upward at 45 dagrees would follow a straight-line path. But because of gravity, at the and of 1 sacond, the stone is actually Aj 5 m below the straight line. B) 15 im below the straight line. 0 10 m below the straight line. 60) An Earth satellite in an elliptical orbit travels fastest when it is Aj farthat from Earth. Bj inearest Earth. G everywhere along its orbit. 70) Escape speed from the Moon is Aj much less than from Earth. Bj about the same as from Earth. C much greater than from Earth