PLS ANSWER FAST.... (#MATHS ARYABHATTAS #PHYSICS NEWTON #GENIUSES ONLY) A rifle is fired straight upward at the ground level and bullet leaves the barrel at an initial speed of 390 m/s. Determine its speed just before striking the ground. Neglect air resistance (Assume g=-10m/s2 )
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work done is equal to change in kinetic energy according to work energy theorem
so 1/2 x(m x v^2)-1/2(m xu^2)=w M=.02 Kg v=100 u=50 1/26.02 x100 x100-1/2(.02 x 50 x50=w
100-25=w
w=75 J
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Answer:
work done is equal to change in kinetic energy according to work energy theorem
so 1/2 x(m x v^2)-1/2(m xu^2)=w M=.02 Kg v=100 u=50 1/26.02 x100 x100-1/2(.02 x 50 x50=w
100-25=w
w=75 J
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