Answer:
<h2>15,000 J</h2>
Explanation:
The potential energy of a body can be found by using the formula
PE = mgh
where
m is the mass
h is the height
g is the acceleration due to gravity which is 10 m/s²
From the question we have
PE = 150 × 10 × 10
We have the final answer as
<h3>15,000 J</h3>
Hope this helps you
 
        
                    
             
        
        
        
Answer:
10
Explanation:
The atomic number is only based on the number of the elements protons.  The neutrons and electrons will only change the atomic mass and properties of the element.  So the atomic number is 10.
 
        
                    
             
        
        
        
Answer:
300.16m/s
Explanation:
An artillery shell is fired at an angle to the horizontal. Its initial velocity has a vertical component of 150 meters per second and a horizontal component of 260 meters per second. What is the magnitude of the initial velocity of the shell?
note velocity is the change in displacement to time
to find the magnitude of the initial speed , 
we will find the square of the vertical component plus the square of the horizontal component. then we look for the square root
U=
U=
U=90,100^2
U=300.16m/s
means that it covers 300.16m in 1 seconds
 
        
             
        
        
        
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Answer:
0°
Explanation:
The angle between force and displacement should be 0° in order to get the maximum work done. 
  
  Work done  = Force  x dcosФ°  
   Ф is the angle between force and displacement 
 When Ф is zero, the maximum work done is attained 
 When Ф is 90, the minimum work is done, in fact, work done is 0