Question

1. find the square root of the following numbers by the repeated subtraction method :

2. 49
= 49 - 1 = 48
= 45 - 9 = 40
= 33 - 9 = 24
= 13 - 13 = 0
= √49 = 7​

Answer 1

Answer:

Weight of boy =40kg

Weight of box =20kg

Total weight (mg)=60×10=600 N

Height (h)=15m

Time (t)=25s

Increase in potential energy =mgh

Increase in potential energy =600×15

Increase in potential energy =9000 J

We know that enrgy is equal to work done and vice versa

Therefore Work Done (W)=9000 J

Power =  

t

W

​  

 

Power =  

25

9000

​  

 

Power =360Js  

−1

 

Power =360 W

Answer 2

Step-by-step explanation:

The previous one is too written by my another account .

So if none could copy my answer ,I have to write this

My dear friend so please mark it as the brainliest.