i'm stuck on that question also
 
        
             
        
        
        
Answer:
110 yds 
Explanation:
Well if 55 yards is 1/2 of the field then 2 x 55 = 110 yards is total field length
 
        
             
        
        
        
Answer:
Explanation:
mass m = 3 kg 
spring constant be k 
k x .8 = 40 N 
k = 40 / .8 = 50 N /m 
angular frequency ω = √ ( k / m )
= √ ( 50 / 3 )
= 4.08 rad /s 
Let amplitude of oscillation be A . 
1/2 k A² = 1/2 m v²
50 A² = 3 x 1²
A = .245 m = 24.5 cm 
For displacement , the equation of SHM is 
x = A sinωt
= 24.5 sin4.08 t 
x = 24.5 sin4.08 t 
Here, angle 4.08 t is in radians . 
 
        
             
        
        
        
Answer:
Explanation:
given,
cyclist ride  6.2 km east and then 9.28 km in the direction of 27.27° west of north and then 7.99 km west.
vertical component = 9.28 cos∅
                                 = 9.28 cos 27.27°
                                 = 8.24 km
horizontal axis component = 9.28 sin ∅
                                              = 9.28 sin 27.27°
                                              = 4.5 km 
distance of the final point from the origin 
                             = 7.99 -(6.2-4.5)
                             = 6.29 km
displacement 

d = 10.37 km
b) 
θ = 37.36°
 
        
             
        
        
        
Explanation:
The general equation of an AC current is given by :

Where
I₀ is the peak value of current
 is angular frequency
 is angular frequency

So,

We know that,

So, the frequency is 50 Hz and the maximum rms value of current is 14.14 A.