Q: For an object moving along a curved path at a constant speed
-its velocity is constant
-none of these
-its acceleration is zero
-its acceleration is perpendicular to its instantaneous velocity
-its acceleration vector is constant
Q: Suppose you are whirling a ball tied to the end of a string in a horizontal circle and you triple its speed.
-Its acceleration vector is constant.
-Its velocity goes up by a multiplicative factor of nine.
-Its centripetal acceleration goes up by a multiplicative factor of nine.
-None of these answers is correct.
-Its centripetal acceleration triples.