1.

a box weighing 40 kg is raised to a height of 15 metre calculate the potential energy gained by the box​

Answer»

of boy =40kgWeight of box =20kgTotal weight (mg)=60×10=600 NHeight (H)=15mTime (t)=25sIncrease in potential energy =mghIncrease in potential energy =600×15Increase in potential energy =9000 JWe know that enrgy is equal to WORK done and vice versaTherefore Work Done (W)=9000 JPower = tW Power = 259000 Power =360Js −1 Power =360 W



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