Answer:
a.tinh do cung k1 va k2 bhsj nshsvsg sjjejsjjsj
 
        
             
        
        
        
Answer:
As Per Provided Information
Moving body has 2m/s² acceleration 
Time taken by body is 4 second
We are asked to find the 'change in velocity' ( ∆V) by the body.
 
<u>Formula Used here</u>

<u>Substituting </u><u>the </u><u>given </u><u>value</u>
<u> </u>
</u>
<u>Therefore</u><u>,</u>
- <u>Change </u><u>in </u><u>velocity </u><u>is </u><u>8</u><u> </u><u>m/</u><u>s</u>
 
        
             
        
        
        
 Answer:
Explanation:
a ) The earth rotates by 2π radian in 24 x 60 x 60 s 
so angular speed ( w )  = 2π / (24 x 60 x 60)  = 7.268 x  10⁻⁵ rad / s 
b ) Linear speed of city of Arlington ( v )  = w r = w R Cosλ where R is radius of the earth and λ is latitude .
v = 7.268 x 10⁻⁵ x  6.371 x 10⁶ cos 32.7357 
389.5 m /s
acceleration = w² r = w² R Cos 32.7357
= (7.268 x 10⁻⁵ )² x 6.371 x 10⁶ x cos 32.7357
=283.08 x 10⁻⁴ m/s² 
 c) velocity ratio =
 w r /w R =
 R cos 32.73/ R  
= Cos 32.73
 = 0.84 .
 
 
        
             
        
        
        
Answer:
40
Explanation:
Mechanical advantage = effort arm / load arm
MA = 20 cm / 0.5 cm
MA = 40
  
        
             
        
        
        
Answer:
54 is the correct answer to this question