Um ok so you subtract 2 on both side the plug in 6
Solution :
Given :
Mass attached to the spring = 4 kg
Mass dropped = 6 kg
Force constant = 100 N/m
Initial amplitude = 2 m
Therefore,
a). 

= 10 m/s
Final velocity, v at equilibrium position, v = 5 m/s
Now, 
A' = amplitude = 1.4142 m
b). 
m' = 2m
Hence, 
c). 

Therefore, factor 
Thus, the energy will change half times as the result of the collision.
Answer:
Weight
Explanation:
The spring balance is used to measure weight of an object.
<span>The number in front is the number of molecules (or atoms) taking part in the (balanced) chemical reaction equation.</span>