Question

solve this sum in steps... ​

Answer 1

Answer:

option (b) is

the answer

Step-by-step explanation:

as we know that speed equals to distance upon time therefore we will divide 20 m/2

which will provide us speed as 10 m/s

• then since we are taking magnitude so there will be no change on speed in next 4 seconds (speed will be positive for the next 4 second also)
• so when we will divide it will get 20m/2s which is equal to 5m/s
• finally when we will take out the ratio we will get it as 2 is to 1 (2:1)

Answer 2

Answer:

Hope this helps

The answer is option 2

Step-by-step explanation:

We know that,

Velocity or Speed = Total Displacement/ Total Time

Here, for the first two seconds,-(i)

Total Time,( 0s to 2s)= 2 s

= 2 sTotal Displacement = 20 m

Therefore, Total Speed or Velocity = (20/2)m/s

= 10 m/s

For the last four seconds,- (ii)

Total Time,(2s to 6s) = 4 s

Total Time,(2s to 6s) = 4 sTotal Displacement = 20 m

Total Time,(2s to 6s) = 4 sTotal Displacement = 20 mTotal Velocity or Speed= (20/4)m/s

= 5 m/s

Therefore if we take (i) and (ii) ratio -

= 10:5

= 2:1 Ans