The Potential energy stored in the system is 1 J
<u>Explanation:</u>
Given-
Mass, m = 4 kg
Spring constant, k = 800 N/m
Distance, x = 5cm = 0.05m
Potential energy, U = ?
We know,
Change in potential energy is equal to the work done.
So,

By plugging in the values we get,

Therefore, Potential energy stored in the system is 1 J
 
        
             
        
        
        
A) it occurs when earth is between the sun and the moon
 
        
             
        
        
        
Answer:
The general equation for conservation of momentum during a collision between n number of objects is given as: [m i ×v i a ] = [m i ×v i b ] Where m i is the mass of object i , v i a is the velocity of object i before the collision, and v i b is the velocity of object i after the collision.
Explanation:
 
        
             
        
        
        
Answer:
a = 2 m/s2
Explanation:
we know from newtons 2nd law 
 F = ma. 
we also know that from hookes law we have 
 F = kx
equate both value of force to get value of acceleration
 kx = ma, 
where,
k is spring constant = 8.0 N/m
x is maximum displacement  0.10 m
m is mass of object 0.40 kg
a = \frac{kx}{m}
      = \frac{8 *0 .10}{0.40}
a = 2 m/s2
 
        
             
        
        
        
Its tangential speed is constant although its velocity is changing. As the object changes direction, it results in a changing of positive and negative signs of the velocity. Although, the magnitude of the velocity (speed) is not changing.