Answer: distance = 24 meters
Explanation:
speed = distance / time 
distance = speed x time 
speed = 160 cm/s = 1.6 m /s     [ 100 cm = 1 m, 160 cm = 1.6 m ] 
time = 15 s 
distance = 1.6 m/s x 15 s = 24 m 
 
        
             
        
        
        
Answer:
F = 102 N
Explanation:
ASSUMING the track is horizontal to avoid gravity potential energy considerations.
The work of the applied force must overcome friction work and increase the kinetic energy of the runner
F(d) = Ff(d) + ½m(v² - u²)
F = Ff + m(v² - u²) / 2d
F = 30.0 + 60.0(8.00² - 2.00²) / (2(25.0))
F = 102 N
 
        
             
        
        
        
The unmodulated carrier wave is going into the box, and when it comes out, its AMPLITUDE has been modulated.
 
        
                    
             
        
        
        
I think the answer is potential 
        
             
        
        
        
Equal to 50
law of reflection: angle of incidence equals angle of reflection