Answer:
Both pairs have four pairs of perpendicular sides.
Explanation:
A rectangle and a square both have four right angles and four perpendicular lines.
 
        
                    
             
        
        
        
Answer:
 ∵
                                  ∵ 
Explanation:
The tangential acceleration of a cart moving at a constant speed in a circle is:
The angular velocity is constant when the circular speed is constant.
We know that the (instantaneous) tangential velocity of such object is given by:

Now for angular acceleration we have a constant angular speed:

And angular acceleration is related to tangential acceleration as:


 
        
             
        
        
        
0.05*0.2=0.05*0.15+0.015*m2',
m2'=1/6 m/s,
m2'=0.17 m/s
N I C E - D A Y!
 
        
             
        
        
        
A. True. You can use displacement to determine the volume of solids and liquids.
        
                    
             
        
        
        
2.c 
3.b
1.a
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