CBSE Class 11-science Answered
clear my doubt
![question image](http://images.topperlearning.com/topper/new-ate/top_mob1694332785453396000b4282859-6cf6-4319-9abc-8a5fd73fe2ba.jpg)
Asked by anshujaiswalname | 10 Sep, 2023, 13:29: PM
Initial speed vi is 20 km/hr and the direction is due North. hence initial velocity
is
![begin mathsize 14px style stack v subscript i with rightwards arrow on top end style](https://images.topperlearning.com/topper/tinymce/cache/c98a2c7183b4797ec89e672c8d5a3402.png)
![begin mathsize 14px style stack v subscript i with rightwards arrow on top space space equals space left parenthesis space 20 space k m space divided by space h r space right parenthesis stack space j with hat on top end style](https://images.topperlearning.com/topper/tinymce/cache/04aedb67c49ad97d9d4ec1e820bf8d3c.png)
Final spped is 20 km/hr and direction is 60o west of north . Hence final velocity
is
![begin mathsize 14px style stack v subscript f with rightwards arrow on top end style](https://images.topperlearning.com/topper/tinymce/cache/b6df3054d553dc3560ae114d11b6da9c.png)
![begin mathsize 14px style stack v subscript f with rightwards arrow on top space equals space left parenthesis space 20 space k m space divided by space h r right parenthesis space left parenthesis space cos 60 space i with hat on top space plus space sin 60 space j with hat on top space right parenthesis end style](https://images.topperlearning.com/topper/tinymce/cache/2fce13f8b3f6969801a826282db7f050.png)
![begin mathsize 14px style stack v subscript f with rightwards arrow on top space equals space left parenthesis space 10 space k m divided by h r space right parenthesis space i with hat on top space plus space left parenthesis 17.32 space k m divided by h r space right parenthesis space j with hat on top end style](https://images.topperlearning.com/topper/tinymce/cache/92ec39d3cf53201570c5330ef0dea79e.png)
Change in velocity
![begin mathsize 14px style stack v subscript f space with rightwards arrow on top space minus space stack v subscript i with rightwards arrow on top space equals space left parenthesis space 10 space space k m divided by h r space right parenthesis space i with hat on top space minus space left parenthesis 2.68 space k m divided by h r space right parenthesis space j with hat on top end style](https://images.topperlearning.com/topper/tinymce/cache/11c844729d6095ed1cbe81e801025de2.png)
Answered by Thiyagarajan K | 10 Sep, 2023, 21:20: PM
Concept Videos
CBSE 11-science - Physics
Asked by bhuvana.s3001 | 21 Jun, 2024, 23:21: PM
CBSE 11-science - Physics
Asked by parthjain2448 | 12 Jun, 2024, 15:53: PM
CBSE 11-science - Physics
in a vertical circle of radius r at what point in its path a particle may have tension equal to zero
Asked by momintaufik26 | 13 Oct, 2023, 20:26: PM
CBSE 11-science - Physics
Asked by anshujaiswalname | 10 Sep, 2023, 13:29: PM
CBSE 11-science - Physics
Asked by subhashreeojha235 | 20 Jul, 2023, 11:22: AM
CBSE 11-science - Physics
Asked by advssdrall | 07 Oct, 2022, 23:11: PM
CBSE 11-science - Physics
Asked by sohail.saba0311 | 09 Sep, 2021, 20:23: PM
CBSE 11-science - Physics
Asked by ananthi.baskae | 07 Sep, 2021, 09:18: AM
CBSE 11-science - Physics
Asked by udityashekhawat123 | 09 May, 2020, 00:26: AM
CBSE 11-science - Physics
Asked by Topperlearning User | 04 Jun, 2014, 13:23: PM