Answer:
Explanation:
A ) When gymnast is motionless , he is in equilibrium 
T = mg 
= 63 x 9.81
= 618.03 N 
B )
When gymnast climbs up at a constant rate , he is still in equilibrium ie net force acting on it is zero as acceleration is zero. 
T = mg 
= 618.03 N 
C ) If the gymnast climbs up the rope with an upward acceleration of magnitude 0.600 m/s2
Net force on it = T - mg   , acting in upward direction 
T - mg = m a 
T =  mg + m a 
= m ( g + a )
= 63 ( 9.81 + .6)
= 655.83 N 
D )  If the gymnast slides down the rope with a downward acceleration of magnitude 0.600 m/s2 
Net force acting in downward direction 
mg - T = ma 
T = m ( g - a )
= 63 x ( 9.81 - .6 )
= 580.23 N 
 
        
             
        
        
        
Answer:
268N
Explanation:
The upward force acting on the block are the reaction and the hooked table..
The total normal force acting = normal reaction + 24N
Note that the normal reaction is always equal the weight of the table 
Hence the normal force acting in the block is 244.0+24 = 268.0N
 
        
             
        
        
        
<h3><u>Answer and Explanation</u>;</h3>
- input force refers to the force exerted on a machine, also known as the effort, while the output force is the force machines produce or the Load. The ratio of output force to input force gives the mechanical advantage of a simple machine
- <em><u>The output force exerted by the rake must be less than the input force because one has to use force while raking. The force used to move the rake is the input force. </u></em>
- <em><u>The rake is not going to be able to convert all of the input force into output force, the force the rake applies to move the leaves, because of friction.</u></em>
 
        
        
        
Answer:
 The equation which describes conservation of charge is 
Explanation:
The law of conservation charge states that for an isolated system that sum of initial charges is equal to sum of final charges, that is the total charge is conserved.
let the sum of initial charges = 
let the sum of the final charges = 

Therefore, the equation which describes conservation of charge is 
 
        
             
        
        
        
Answer:

Explanation:
From the question we are told that:
Water index of refraction 
Glass index of refraction 
Generally the equation for Brewster's law is mathematically given by
  
  
  
Therefore Angle of incident to plane  \mu (normal at 90 degree to the surface) 
  
  
  