Question

3. The table given below shows distance (in cm) traveled by the bodies A B and
Read this data carefully and answer the questions which follow.
Distance (in cm) covered by different bodies
Time
Body A
Body B
Body C
Ist second
20
20
20 second
36
3rd second
24
100
4 second
140
5th second
20
48
180
(a) Which of the bodies is moving with
(1) Constant speed?
(ii) Constant acceleration?
(b) Which of the bodies covers
(i) maximum distance in 30 second?
(ii) Minimum distance in 34 second?
(c) Which of the bodies is moving with non-uniform acceleration?
(d) Sketch a distance time graph for motion of
(i) body A
(ii) body
(e) How much distance is covered by body C in 5s?
(1) How much distance is covered by body B in last three seconds"?
(g) Which of the bodies covers least distance in first three second?​

Answer 1

Explanation:

(a) The body A is moving with constant speed of 20 cm/s.

(b)The body C is moving with constant acceleration.

60-20/1=100-60/1=140-100/1=180-140/1=

(c) (i) Body C covers maximum distance 100cm in 3rd second.

(ii) Body A covers minimum distance in 3rd second.

(d) Body B is moving with non-uniform acceleration and body C is moving with uniform acceleration.

(e) Distance covered by body C in 5 seconds=20+60+100+140+180=500 cm=5 m

(f) Distance covered by body B in last 3 seconds=100+140+180=420 cm=4.2 m

(g)Body A covers least distance (20+20+20) 60 cm in first three seconds.

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