
- A ball is dropped from a height = H
- The total distance covered in last second of its motion is equal to the distance covered in first 3 second .

- The height of the journey .

We have know that,

Where,
- u = initial velocity = 0m/s
[Note :- Here, acceleration is ‛acceleration due to gravity’ .]
=> S = 1/2 × 10 × (3)^2
=> S = 5 × 9
=> S = <u>4</u><u>5</u><u>m</u> -----(1)
✒ If the ball takes ‛n’ second to fall the ground, then distance covered in nth second is,

=> Sn = 0 + 10/2 (2 × n - 1)
=> Sn = 5 (2n - 1)
=> Sn = 10n - 5 -----(2)
Therefore, 
=> 10n = 45 + 5
=> n = 50/10
=> n = <u>5</u>
Now put the value of ‛n = 5’ in equation(2), we get
=> Sn = 10 × 5 - 5
=> Sn = 50 - 5 
=> <u>Sn</u><u> </u><u>=</u><u> </u><u>4</u><u>5</u><u>m</u>
 The height of the journey is “ <u>4</u><u>5</u><u>m</u> ” .
 The height of the journey is “ <u>4</u><u>5</u><u>m</u> ” .
 
        
             
        
        
        
I’m pretty sure the answer would be : 
9.8m/s2
Explanation: gravity =9.8m/s2
        
             
        
        
        
Resistance in wires is transformed into thermal energy, you can observe this fact when you are charging your phone and feel the wire is quite hot. That is a result of the resistance. 
        
             
        
        
        
Answer:
yes
Explanation:
kinetic energy is when something has a force acting upon it. potential energy is the opposite
 
        
                    
             
        
        
        
Answer:
can u try to calculate it and you will get the answer