question_answer

    The table given below shows distance (in cm) travelled by bodies A, B and C. Read this data carefully and answer the following questions. Distance (in cm) covered by different bodies  

Time in (S)	Body (A)	Body (B)	Body(C)
1st second	20	20	20
2nd second	20	36	60
3nd  second	20	24	100
4th  second	20	30	140
5th  second	20	48	180

  (i) Which of the bodies is moving with (a) constant speed? (b) constant acceleration? (c) non-uniform acceleration? (ii) Which of the bodies covers (a) maximum distance in 3rd second? (b) minimum distance in 3rd second?  

Answer:

      (i) (a) Body A (b) Body C   (c) Body B (ii) (a) Body C. Total distance travelled = 100 - 60 = 40 cm (b) Body B. Total distance travelled=24-36=(-) 12cm The negative sign implies decceleration.