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Physics
Work and Energy
CBSE
Class 9
Physics
Class 9 - Physics
Work and Energy
MCQ
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1.
A baU of mass 50 g is thrown upwards.It rises to a maximum height of 100 m.At what height its KE is reduced to 70% ?
a.
30 m
b.
40 m
c.
60 m
d.
70 m
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