if you are intelligent then answer this question with explanation....
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using conservation of energy
ke1+pe1=ke2 +pe2
or ½m(v1)²+mgh1 = ½m(v2)²+mgh2
or ½m5²+mg*4 = ½m(v2)²+mg*1.65
or 25/2+4g=½(v2)²+1.65g
or [12.5+4g-1.65g]*2=(v2)²
or (v2)²=25+2.35*10*2 (if g=10)
or. (v2)²= 25+47m/s
or v2=√72= 6√2 m/s
correct option is c
ke1+pe1=ke2 +pe2
or ½m(v1)²+mgh1 = ½m(v2)²+mgh2
or ½m5²+mg*4 = ½m(v2)²+mg*1.65
or 25/2+4g=½(v2)²+1.65g
or [12.5+4g-1.65g]*2=(v2)²
or (v2)²=25+2.35*10*2 (if g=10)
or. (v2)²= 25+47m/s
or v2=√72= 6√2 m/s
correct option is c
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