Answer:
576 joules 
Explanation:
From the question we are given the following:
weight = 810 N
radius (r) = 1.6 m
horizontal force (F) = 55 N
time (t) = 4 s
acceleration due to gravity (g) = 9.8 m/s^{2}
K.E = 0.5 x MI x ω^{2}
where MI is the moment of inertia and ω is the angular velocity
MI = 0.5 x m x r^2
mass = weight ÷ g = 810 ÷ 9.8 = 82.65 kg
MI = 0.5 x 82.65 x 1.6^{2}
MI = 105.8 kg.m^{2}
angular velocity (ω) = a x t
angular acceleration (a) = torque ÷ MI
where torque = F x r = 55 x 1.6 = 88 N.m
a= 88 ÷ 105.8 = 0.83 rad /s^{2}
therefore 
angular velocity (ω) = a x t = 0.83 x 4 = 3.33 rad/s
 
K.E = 0.5 x MI x ω^{2}
K.E = 0.5 x 105.8 x 3.33^{2} = 576 joules 
 
        
             
        
        
        
Answer:

Explanation:
Moment of inertia of given shell
where
M represent sphere mass
R -sphere radius
we know linear speed is given as 
translational 
rotational 
total kinetic energy will be 


fraction of rotaional to total K.E

 
        
             
        
        
        
We know that velocity is equal to the total displacement of an object over time.

Deriving from that equation, we can say that:

Okay, so here it goes:

The bicycle took 25.02 seconds to displace at 58.3 meters.
 
        
        
        
Mechanical digestion is chewing, and chemical digestion is the saliva in your mouth breaking down food.
        
                    
             
        
        
        
If your speed changes from 10 km/h to 6 km/h then 
you have an acceleration.  
Whether it's a positive or negative one completely depends 
on which direction you decided to call the positive direction, 
when you started considering your speed and its changes.
If you decided to call the direction in which you're traveling 
the positive direction, then a decrease in your speed is a 
negative acceleration.  
But you could just as easily have said that you're traveling 
in the negative direction.  If you did that, then a decrease in 
your speed would be a positive acceleration.
It's completely up to you, and how you define things.