A particle travels at a constant velocity of 3ms–1 for 20s. Then it

1.	A particle travels at a constant velocity of 3ms–1 for 20s. Then it stops for 10s before completingits journey in another 30s at a constant velocity of 2 ms–1. Its average velocity for the wholejourney is [ ]a) 2 ms–1 b) 2.4 ms–1 c) 2.7 ms–1 d) 3 ms–1
Answer» Given : Velocity FOT FIRST 20 sec = 3m/s Velocity fot another 30 sec = 2m/s To find : Average velocity for the whole journey = ? Solution : DISTANCE travelled in first 20 sec Distance = speed × Time = 20 × 3 = 60m Distance travelled in another 30 sec Distance = speed × Time = 30 × 2 = 60m Average velocity = Total distance travelled / Time taken = 60 + 60 / (30+20+ 10) =120 / 60 = 2m/s The average velocity of the particle is 2m/s

A particle travels at a constant velocity of 3ms–1 for 20s. Then it stops for 10s before completingits journey in another 30s at a constant velocity of 2 ms–1. Its average velocity for the wholejourney is [ ]a) 2 ms–1 b) 2.4 ms–1 c) 2.7 ms–1 d) 3 ms–1

Answer»

Given :

Velocity FOT FIRST 20 sec = 3m/s

Velocity fot another 30 sec = 2m/s

To find :

Average velocity for the whole journey = ?

Solution :

DISTANCE travelled in first 20 sec

Distance = speed × Time

= 20 × 3

= 60m

Distance travelled in another 30 sec

Distance = speed × Time

= 30 × 2

= 60m

Average velocity = Total distance travelled / Time taken

= 60 + 60 / (30+20+ 10)

=120 / 60

= 2m/s

The average velocity of the particle is 2m/s

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A particle travels at a constant velocity of 3ms–1 for 20s. Then it stops for 10s before completingits journey in another 30s at a constant velocity of 2 ms–1. Its average velocity for the wholejourney is [ ]a) 2 ms–1 b) 2.4 ms–1 c) 2.7 ms–1 d) 3 ms–1​

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A particle travels at a constant velocity of 3ms–1 for 20s. Then it stops for 10s before completingits journey in another 30s at a constant velocity of 2 ms–1. Its average velocity for the wholejourney is [ ]a) 2 ms–1 b) 2.4 ms–1 c) 2.7 ms–1 d) 3 ms–1