Hello,
  For the Question:"A batsman deflects a ball by an angle of 45 degrees, without changing the speed of the ball(54kms/hrs),what is the impulse on the ball (assume mass=0.15kg),
 
(i)can i draw the diagram like this ?
 
if Not, why not... if YES then how do i solve it further ?

Asked by Vikram Pandey | 25th Aug, 2015, 12:05: AM

Expert Answer:

Dear vikram_pandey@yahoo.com

begin mathsize 12px style Given colon mass space of space ball comma straight m space equals space 0.15 space kg space space Speed space of space ball comma straight u space equals space 54 space kmh space space equals space 15 space straight m divided by straight s The space angle space between space initial space and space final space momentum space is space 45 degree space. space space Momentum comma space straight p space equals space mv space Find space the space first space momentum colon space space straight p subscript 1 space equals space mv space equals space 0.15 space cross times space 15 space equals space space 2.25 space kg space straight m over straight s After space occasion space we space have space the space second space momentum colon straight p subscript 2 space equals space mv space times space cos space straight theta space equals space 0.15 space cross times space 15 space cross times space cos space 45 degree space equals space 1.575 space kg space straight m over straight s Hence comma space in space projection space on space straight x space straight p subscript 1 space equals space minus 2.25 space space kg space straight m over straight s straight p subscript 2 space equals space 1.575 space space kg space straight m over straight s increment straight p space equals space straight p subscript 2 space minus space straight p subscript 1 space equals space 3.3825 space kg space straight m over straight s end style
 
 
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Answered by Priyanka Kumbhar | 25th Aug, 2015, 03:46: PM