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CBSE Class 11-science Answered

A particle of mass m is given speed u at angle theta at topmost point It breaks into two equal parts one comes to rest  find point of landing of second mass

Asked by ashishgarud539 | 15 Dec, 2021, 04:12: PM
Expert Answer
Let's consider that the horizonatl range of particle from where it is projected is R. 
At highest point the horizontal velocity before splitting is = ucosθ
By law of conservation of linear momentum, 
mucosθ = m/2(v)+m/2(0)
Thus, v = 2ucosθ 
As velocity becomes twice the initial velocity range will also become twice and time will depend only on vertical component of velocity. 
Thus, 
The point of landing of other particle = horizontal distance travelled by particle after breaking into two parts 
d = R/2 + R = 3R/2 
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