Answer:
+ 3.0 m 
Explanation:
displacement is shortest distance from fixed point O in particular direction . in diagram shortest distance at end from O is 3 m and it is right of O so +. HENCE +3.0m
 
        
             
        
        
        
Answer:
500000N/m²
 5250N
Explanation:
Given parameters: 
Depth(H) = 50m 
Density of water  = 1000kg/m³
Acceleration of free fall  = 10m/s
Unknown: 
Pressure the water exerts on the diver = ? 
Solution: 
Pressure is the force per unit area on a body. In fluids, pressure is the product of density, gravity and height
   Pressure in fluids  = Density x acceleration due to gravity x height
Input the variables and solve; 
     Pressure in fluids  = 1000 x 10 x 50  = 500000N/m²
B. 
 width of window = 150mm
 height of window = 70mm
Force water exerts on the window = ? 
To solve this problem; 
 
          Pressure  = 
Area of the window = width x height  = 150 x 10⁻³ x 70 x 10⁻³ 
                                                            = 1.05 x 10 ⁻²m²
Force  = pressure x area
Input the variables; 
              = 500000N/m²   x  1.05 x 10 ⁻²m²
              = 5250N
 
        
             
        
        
        
C. 90 m
30m per second... and it takes 3 seconds 
3x30= 90
        
                    
             
        
        
        
Answer:
the box has vertical force on the table
Explanation:
There can be no single isolated force, for every action there must be a force of reaction of ingual magnitude and direction, but in the opposite direction
 
        
                    
             
        
        
        
Answer:
The law of conservation of energy
Explanation: