Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 11-science Answered

clear my doubt
question image
Asked by anshujaiswalname | 10 Sep, 2023, 01:29: PM
answered-by-expert Expert Answer
Initial speed vi is 20 km/hr  and the direction is due North. hence initial velocity begin mathsize 14px style stack v subscript i with rightwards arrow on top end style is
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
Final spped is 20 km/hr and direction is 60o west of north . Hence final velocity begin mathsize 14px style stack v subscript f with rightwards arrow on top end style is
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
 
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
 
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
Answered by Thiyagarajan K | 10 Sep, 2023, 09:20: PM

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
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, 08:26: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
clear my doubt
question image
Asked by anshujaiswalname | 10 Sep, 2023, 01:29: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
clear my doubt
question image
Asked by subhashreeojha235 | 20 Jul, 2023, 11:22: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
Que: Equal and opposite charges cancel out eachother's effect then why doesn't centrifugal force cancel out centripetal force's effect on a particle moving in circular motion?
Asked by advssdrall | 07 Oct, 2022, 11:11: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
a body is projected with speed 40root2 m/s downwards an angle of 45 degree from vertical if h=100 m find 1. time of flight 2. range
Asked by sohail.saba0311 | 09 Sep, 2021, 08:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
Angular Displacement of a body is given by thete= 2t2+5t+3. Find angular velocity and angular acceleration  
Asked by ananthi.baskae | 07 Sep, 2021, 09:18: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
what is RPM.is it a unit of frequency or angular velocity. If a particle complete 1 revolution in 1 sec find both sec
Asked by udityashekhawat123 | 09 May, 2020, 12:26: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
The position of a particle at any instant is given by . At what instant the velocity vector will make an angle 45o with X-axis.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
A particle starts from the origin at t = 0 with a velocity of  m/s and moves in XY plane with a constant acceleration of . (a) At what time is the X-coordinate of the particle 16 m? (b) What is the Y-coordinate of the particle at that time?
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
A cyclist starts from the center O of circle of park of radius 1 km, reaches the edge P of the park, then cycles along the circumference to point Q and returns to the centre along QO as shown. If the round trip takes 10 minutes, then what is (a) net displacement (b) average velocity (c) average speed of the cyclist?
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×