NEXT TIME QUESTION CONSIDER THREE TYPES OF ROLLERS ON A PAIR OF PARALLEL TRACKS: (1) A CYLINDER. (2) A PAIR OF CUPS FASTENED AT THEIR NARROW ENDS. AND (3) A PAIR OF CUPS FASTENED AT THEIR WIDE ENDS. -CONCEPTUAL Physics WHEN ROLLED ALONG THE TRACK, ONE IS VERY UNSTABLE AND ROLLS OFF THE EDGE. ANOTHER IS MODERATELY STABLE FOR SHORT DISTANCES. THE OTHER IS 2 VERY STABLE AND CENTERS ITSELF ON THE TRACK. 3 WHICH IS WHICH? How does the stable roller relate to the wheels of rellroad cars? CH 8-1' 3 THE CENTERS or GRAVITY or THREE TRUCKS PARKED ON A HILL ARE SHOWN BY THE DOTS. WHICH TRUCKCS) WILL TIP OVER? NEXT-TIME QUESTION Gravity Force on Shuttle sics When at rest on the launching pad, the force of gravity on the space shuttle is quite huge - the weight of the shuttle. When in orbit, some 200 km above Earth's surface, the force of gravity on the shuttle is a) nearly as much. b) about half as much. c) nearly zero (micro-gravity). d) zero. (Neglect changes in the weight of the fuel carried by the shuttle) CH 9-1Consider a giant flat plate that touches their}; Earth at one point and extends out into space. : Suppose you slide on iron block along the plane, where it makes contact with the Earth. Suppose also that the plate is perfectly frictionless, air drag is absent, and v0