Answer:Gravity
Explanation:Gravity is the force that pulls everything down instead of up because if we didn’t have gravity we would be floating upwards
 
        
                    
             
        
        
        
Answer:
16 m/s
Explanation:
Given that
y momentum = 0.080 *25 = 2
x momentum = 0.075*20 = 1.5
total momentum = √(4 + 2.25)
Total momentum = √6.25
Total momentum = 2.5
total mass = mass of x and y momentum = 0.075 + 0.080 = 0.155
speed of mass center = total momentum / total mass = 2.5/0.155 = 16.
And thus, the speed of the center of mass of this two-particle system at this instant is 16 m/s
 
        
             
        
        
        
When potential energy <u>decreases</u>, kinetic energy increases. 
 
        
                    
             
        
        
        
Explanation:
We will use the equations of constant acceleration to find out  and time t.
 and time t.
As we know that the initial speed is zero. So 
(a)   

 ×
× m
m
 ×
× m/s
m/s


    = 
    = 4.356× m/s²
 m/s²
(b)


 = 6.8870×
 = 6.8870× s
s
(c)
Σ
        = (9.11× )(4.356×
)(4.356× m/s²)
m/s²)
        = 3.968× N
 N
 
        
             
        
        
        
Answer:
The correct option is;
- 4x
Explanation:
From the inverse square law, as the distance from the source of a physical quantity increases, the intensity of the source is spread over an area proportional to the square of the distance of the object from the source
The inverse square law can be presented as follows;

As the distance, r, increases, the surface it covers also increases by the power of 2
Therefore, where the distance increases from r to 2·r, we have;
When, I, remain constant

The surface increases to 4·S by the inverse square law
Therefore, the correct option is 4 × x.