NEET Class neet Answered
a body of mass m is projected with u initial speed at angle theta with horizontal.change in momentum after time t
Asked by priyankaranijha2001 | 01 Feb, 2021, 07:17: PM
Expert Answer
At t = 0 , Horizontal component of velocity = u cosθ
After time t , Horizontal componenet of velocity = u cosθ
At t = 0 , vertical component of velocity = u sinθ
After time t , vertical componenet of velocity = ( u sinθ ) - ( g t )
Let horizontal component is parallel to x-axis of cartesian coordinate system and
vertical component coincide with y-axis of cartesian system.
Momentum in vector form at t = 0 , Pi = m [ ( u cosθ ) 
+ ( u sinθ ) 
]
+ ( u sinθ ) ]Then momentum in vector form after time t , Pf = m [ ( u cosθ ) + ( u sinθ - g t ) ]
+ ( u sinθ - g t ) ]Change in momentum ΔP = Pf - Pi = -m ( gt )
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