pls solve these as fast as u can
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6) W=5000J
h=5m
W =F ×d
F=mg
W=mgh
m=W/gh=5000/9.8×5=5000/49=102kg approximately
7)K.E.=1/2mv²
v²=2k.E./m=2×320000/900
v=√6400/√9=80/3=26⅔m/sec
8)ratio of k.e.=v²/(3v)²=v²/9v²=1/9
h=5m
W =F ×d
F=mg
W=mgh
m=W/gh=5000/9.8×5=5000/49=102kg approximately
7)K.E.=1/2mv²
v²=2k.E./m=2×320000/900
v=√6400/√9=80/3=26⅔m/sec
8)ratio of k.e.=v²/(3v)²=v²/9v²=1/9
SupraptiGupta:
which ques is this?
aal the three
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