The twice as heavy weight will hit the ground with more force, or impact.
        
                    
             
        
        
        
Newtons 3.law: Action = Reaction
If a body exerts a force on a rope of 400 N the rope exerts a force on the body of 400N also. So the tension in the rope is 400N. See pictures below.
 
        
        
        
Answer: 0.9264 kg
Explanation: [I'll use "cc" for cubic centimeter, instead of cm^3.
The volume is 6cm*4cm*2cm = 48 cm^3 (cc).
Density of Au is 19.3 g/cc
Mass of gold = (48 cc)*(9.3 g/cc) = 926.4 grams Au
1 kg = 1,000 g
(926.4 grams Au)*(1 kg/1,000 g) = 0.9264 kg, 0.93 kg to 2 sig figs
At gold's current price of $57,500/kg, this bar is worth $53,268. Keep it hidden from your lab partner (and instructor). 
 
        
             
        
        
        
Answer: The spring constant is K=392.4N/m
Explanation:
According to hook's law the	applied force F will be directly proportional to the extension e produced provided the spring is not distorted 
The force F=ke
Where k=spring constant 
 e= Extention produced 
 h=2m
Given that 
e=20cm to meter 20/100= 0.2m
m=100g to kg m=100/1000= 0.1kg
But F=mg
Ignoring air resistance 
assuming g=9.81m/s² 
Since the compression causes the plastic ball to poses potential energy hence energy stored in the spring 
E=1/2ke²=mgh
Substituting our values to find k
First we make k subject of formula
k=2mgh/e²
k=2*0.1*9.81*2/0.1²
K=3.921/0.01
K=392.4N/m