Answer:
C)T
Explanation:
The period of a mass-spring system is:

As can be seen, the period of this simple harmonic motion, does not depend at all on the gravitational acceleration (g), neither the mass nor the spring constant depends on this value.
 
        
             
        
        
        
Answer:
Gravity, Weak, Electromagnetic and Strong.
 
        
             
        
        
        
Explanation:
since both the teammates are of the same height, their height won't matter. Because now the basketball won't cover any vertical distance. 
We have to calculate its range the horizontal distance covered by it when tossed from one teammate to the other. 
range can be calculated by the formula :- 

u is the velocity during its take off and  is the angle at which its thrown
 is the angle at which its thrown 
Given that 
- u = 8m/ s 
 = 40° = 40°
calculating range using the above formula 


value of sin 80 = 0. 985



Hence, 
