Answer:
vertical component = 9.7m/s
Explanation:
Vy= (23)sin25 = 9.7m/s
 
        
             
        
        
        
Answer:
Although the speed changes and wavelength changes, the frequency of the light will be constant. The frequency, wavelength, and speed are related by: The change in speed that occurs when light passes from one medium to another is responsible for the bending of light, or refraction, that takes place at an interface.
Explanation:
 
        
             
        
        
        
Can't really plot a graph here for question 1.
2a) The car speeds up from A to B. The car travels at a constant speed from B to C. The car slows down to a stop from C to D.
b) From the graph, at 10 seconds, the car is moving at 20 m/s.
        
             
        
        
        
Solution :
Given data :
Mass of the merry-go-round, m= 1640 kg
Radius of the merry-go-round, r = 7.50 m
Angular speed,  rev/sec
  rev/sec
                               rad/sec
  rad/sec
                               = 5.89 rad/sec
Therefore, force required, 

     
  
    = 427126.9 N
Thus, the net work done for the acceleration is given by :
W = F x r
    = 427126.9 x 7.5
    = 3,203,451.75 J