A body of mass 5 kg climb a height of 10 m by the force of 170 N . Its velocity at this heightwil be ……….

A body of mass 5 kg climb a height of 10 m by the force of 170 N . Its

1.	A body of mass 5 kg climb a height of 10 m by the force of 170 N . Its velocity at this heightwil be ……….
Answer» 15 m/s 37 m/s `9.8` m/s 22 m/s Solution :Work done by force W = FH `= 170 xx10` ` = 1700 J ` gravitationalpotential energy U = MGH ` = 5 xx 10 xx10` = 500 J Now , kintic energy = `W - U ` ` :. 1/2 mv^(2) = 1700 - 500` ` :. 1/2 mv^(2) = 1200 J ` ` :. v = sqrt((2xx1200)/5) = sqrt((2400)/5)` ` :. v = sqrt(480)` = `21.90` ` :. v = 22` m/s (approximate)