Answer:
W = -1844.513 J 
Explanation:
GIVEN DATA:
mass of spider man is m  74 kg
vertical displacement if spider is 11 m
 final displacement  =  11 cos 60.6 =  - 6.753 m
change in displacement is  = -6.753 - (-11) = 4.25 m
 gravity force act on spiderman is f = mg = 74 × 9.8 = 725.2 N
work done by gravity is 

where 180 is the angle between spiderman weight and displacement
W = -1844.513 J 
 
        
             
        
        
        
Answer:
The moment of inertia is 
Explanation:
The moment of inertia is equal:

If r is 
and 


 
        
             
        
        
        
Answer:
D) the second at the doorknob
Explanation:
The torque exerted by a force is given by:

where
F is the magnitude of the force
d is the distance between the point of application of the force and the centre of rotation
 is the angle between the direction of the force and d
 is the angle between the direction of the force and d
In this problem, we have:
- Two forces of equal magnitude F
- Both forces are perpendicular to the door, so 
- The first force is exerted at the midpoint of the door, while the 2nd force is applied at the doorknob. This means that d is the larger for the 2nd force
--> therefore, the 2nd force exerts a greater torque
 
        
             
        
        
        
The distance covered by the object between t =4 s and t = 6 s is 4 m
Explanation:
In a velocity-time graph, the distance covered by the object represented can be found by calculating the area under the curve.
Therefore, the distance covered by the object between t = 4 s and t = 6 s is the area under the curve between 4 s and 6 s.
We see that we have to calculate the area of a triangle, with:
Base: 

And height:

Therefore, the area is

So, the distance covered by the object is 4 m.
Learn more about distance:
brainly.com/question/3969582
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