1. Which of the bodies is moving with (a) constant speed? (b) constant acceleration?

Question

Instruction: The table given below shows distance (in cm) travelled by the bodies A, B and C. Read this data carefully and answer the questions which follow.

Distance (in cm) covered by different bodies

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

1. Which of the bodies is moving with 

(a) constant speed? 

(b) constant acceleration? 

2. Which of the bodies covers 

(a) maximum distance in 3 rd second? 

(b) minimum distance in 3 rd second? 

3. Which of the bodies is moving with non-uniform acceleration?

Answer 1

1. a) Body A moves with constant speed since it travels equal distance in equal interval of time. 

b) Body B moves with constant acceleration since the rate of change of distance per second in it is constant. 

2. a) Body C covers the maximum distance in 3^rd second. 

C covers 100 cm whereas A & B cover 20 cm & 24 cm in 3^rd second. 

b) Body A covers the minimum distance in 3^rd second. 

Since A covers only 20 cm which is less than covered by B (24 cm) and C (100 cm) 

3. Body C is moving with non-uniform acceleration