Answer:
A) Φ = 0
, B)  T = 7.76 s
Explanation:
A) to find the value of the phase constant replace the value
           0 = a sin (b (0- 0) + Φ)
            0 = sin Φ
            Φ = sin⁻¹ 0
            Φ = 0
B) the period is defined by time or when the movement begins to repeat itself
So that the sine function is repeated when the angle passes 2pi
             b (x- ct) = 2pi
If we are at a fixed point x = 0
            b c t = 2pi
             t = 2π / bc
Let's calculate
             T = 2π / (33.05 245)
             T = 7.76 s
 
        
                    
             
        
        
        
- Speed is the rate of change of distance with time while velocity is the rate of change of displacement with time.
 - Speed is a scalar quantity while velocity is a vector quantity.
 - Speed cannot be negative but velocity can be negative.
 
Hope you could get an idea from here.
Doubt clarification - use comment section.
 
        
             
        
        
        
Answer:
When an object is balanced, about a pivot, the total clockwise moment must be equal to the total anticlockwise moment about that pivot.
Hope that helps.
 
        
             
        
        
        
The best and most correct answer among the choices provided by the question is <span>f(t) = −70 cos pi over 6t + 110</span><span>.
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Hope my answer would be a great help for you.    
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