Answer:
Explanation:
a )
Reaction force of the ground 
R = mg 
= 160 N 
Maximum friction force possible 
= μ x R 
= μ x 160
= .4 x 160
= 64 N . 
b ) 
  160 N will act at middle point . 740N will act at distance of 3 / 5 m from the wall , 
Taking moment about top point of ladder 
160 x 1.5 + 740 x 3/5 + f x 4 = 900 x 3
240 + 444 + 4f = 2700
f = 504 N 
c )
Let x be the required distance.  
Taking moment about top point of ladder 
160 x 1.5 + 740 x 3 x / 5 + .4 x 900 x 4  = 900 x 3  ( .4 x 900 is the maximum friction possible ) 
240 + 444 x + 1440  = 2700
x = 2.3  m 
so man can go upto 2.3 at which maximum friction acts . 
 
        
             
        
        
        
Answer:
E. Zero Maximum
Explanation:
At the point of maximum displacement, the speed is zero while the restoring force is maximum. In fact:
- The restoring force is given by  , where k is the spring constant and x is the displacement - at the point of maximum displacement, x is maximum, so F is maximum as well
, where k is the spring constant and x is the displacement - at the point of maximum displacement, x is maximum, so F is maximum as well
- the total energy of the system is sum of kinetic energy and elastic potential energy:

where m is the mass of the system and v is the speed. Since E (the total energy) is constant due to the law of conservation of energy, we have that when K increases, U decreases, and viceversa. As a result, when x increases, v decreases, and viceversa. At the point of maximum displacement, x is maximum, so v will have its minimum value (which is zero, since the system is changing direction of motion).
 
        
             
        
        
        
Neutral. A neutron doesn’t have a positive charge like a proton or a negative charge like an electron.
        
                    
             
        
        
        
- Coefficient of static friction = 0.5
- Coefficient of Kinetic friction = 0.3
- Angular velocity = 500 RPMs
<h3>The Radius of the System</h3>
Let R be the radius of cylinder 

The angular velocity is 500 RPMs

The normal force

Since the radius is very little for two block to execute circular motion so system will slide down.
Learn more on coefficient of static friction here;
brainly.com/question/11841776
brainly.com/question/25772665
brainly.com/question/26400616
 
        
             
        
        
        
Answer: Input work is the work done on a machine as the input force acts through the input distance.Other ways it would be the work done on a body or system, that is, forces that are applied to the body or system. This is in contrast to output work which is a force that is applied by the body or system to something else.Output work is the work done by a machine as the output force acts through the output distance. The machine does to the object to increase the output distance.
Explanation: