Question
at successive o0.20-second time intervals are represemied by ure below. The blocks are moving toward the righ the 19. The positions of two blocks at successive 0.20-second tim squares in the fig 2 3 2 speed? Do the blocks ever have the same (A) No. (B) Yes, at instant 2. (C) Yes, at instant 5. (D) Yes, at instants 2 and 5. (E) Yes, at some time during the interval 3 to 4. ive 0.20-second time intervals are represented by the 20. The posit numbered tions of two blocks at successi squares in the figure below. The blocks are moving toward the right 3 4 Block a Block b 4 2 ons of the blocks are related as follows: The accelerati (B) T (C) The accelera (A) The acceleration of"a" is greater than t of "a" is greater than the acceleration of "b". (A) The acceleration B) The acceleration of a" equals the accelerat he acceleration of "a" equals the acceleration of than zero. "b". Both accelerations are greater tion of "b" is greater than the acceleration of "a". (D) The acceleration of "a" equals the acceleration (E) Not en he acceleration of "a" equals the acceleration of of "b". Both accelerations are zero ough information is given to answer the question.
Explanation / Answer
19.
lower block is moving with constant speed covering 4 division between each 0.2 s
upper block is slower at the begining and become fast. Somewhere between 3 to 4 it also covers 4 division.
So answer: E
20.
Block b is moving with constant speed covering 6 division each 0.2 s interval.
Block a is moving with constant speed covering 4 division each 0.2 s interval.
So, acceleration of both are 0
Answer: D
