What will be the ratio of her weight in orbit to her weight on the planet's surface? 3. if a car's wheels are replaced with wheels of greater diameter, will the reading of the speedometer change? explain. 4. objects moving along a circular path have a centripetal accel- eration provided by a net force directed towards the center. identify the force(s) providing the centripetal acceleration in each of these cases: (a) a planet in circular orbit around its sun; (b) a car going around an unbanked, circular turn; (c) a rock tied to a string and swung in a vertical circle, as it passes through its highest point; and (d) a dry sock in a clothes dryer as it spins in a horizontal circle. 5. a pendulum consists of a small object called a bob hanging from a light cord of fixed length, with the top end of the cord fixed, as represented in figure cq7.5. the bob moves without friction, swing- equally high on both sides. it ng moves from its turning point a through point b and reaches its maximum speed at point c. (a) at figure ca7.5