Answer:
Explanation:
Given
Force 
time interval 
Impulse is given by 
 
 
For two significant Figure

                         
 
        
             
        
        
        
The work done by Joe is 0 J.
<u>Explanation</u>:
When a force is applied to an object, there will be a movement because of the applied force to a certain distance. This transfer of energy when a force is applied to an object that tends to move the object is known as work done.
The energy is transferred from one state to another and the stored energy is equal to the work done.
                                  W = F . D
where F represents the force in newton,   
           D represents the distance or displacement of an object.
 Force = 0 N,   D = 20 cm = 0.20 m 
                                  W = 0  0.20 = 0 J.
 0.20 = 0 J. 
Hence the work done by Joe is 0 J. 
 
        
             
        
        
        
Answer:
Both A and C
Explanation:
I just got it correct on Edg
 
        
                    
             
        
        
        
Answer:
A)  If the paintball stops completely the magnitude of the change in the paintball’s momentum is  
B) If the paintball bounces off its target and afterward moves in the opposite direction with the same speed, the change in the paintball’s momentum is  
C) A paintball bouncing off your skin in the opposite direction with the same speed hurts more than a paintball exploding upon your skin because of the strength exerted is twice than if it explodes.
Explanation:
Hi
A) We use the formula of momentum  , so we have
, so we have 
B) We use the same formula above, then due we have a change of direction at the same speed, therefore the change in the momentum is the double so
 .
.
C) The average strength of the force an object exerts during impact is determined by the amount the object’s momentum changes. therefore
 , as we don't have any data about the impact time but we know momentum is twice, time does no matter and strength is twice too.
, as we don't have any data about the impact time but we know momentum is twice, time does no matter and strength is twice too.
 
        
             
        
        
        
Answer: Volume = 1080m^3
Explanation:
Given that the prism has a 15 m by 18 m rectangular base and a height of 4 m
Volume is the product of length, breath and height. That is
Volume = L × B × H
Where 
L = 18 m
B = 15m
H = 4m
Using the formula above gives:
Volume V = 18 × 15 × 4
V = 1080 m^3