Under which of the following conditions is the magnitude of the average velocity of a particle moving in one dimension smaller than the average speed over the time interval?
1.A particle moves in the +x direction and then reverses the direction of its motion.
2.A particle moves in the -x direction without reversing.
3.There are no conditions for which this is true.
4.A particle moves in the +x direction without reversing.
Question 2
If the average speed of a particle is greater than 0 m/s over some interval of time, which of the following is true?
1.The instantaneous speed of the particle at some time during the interval could never have been greater than 0 m/s.
2.The instantaneous speed of the particle at some time during the interval must have been equal to 0 m/s.
3.The instantaneous speed of the particle at some time during the interval must have been greater than 0 m/s.
4.The instantaneous speed of the particle at some time during the interval could never have been less than 0 m/s.
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