Answer:
E=1760.93 cal
Explanation:
a) First we find the total time
t=x/v
t=189000/12.5
t=15120 seconds
Now we multiply the time by his total wattage
E=t*W
E=(15120)(6.5)(75)=7371000 joules
As,
1 joule = 2.389 x 10-4
So, in term of nutritional Calories
E=7371000 * 2.389*
E=1760.93 Cal
If your keg is not moving the only energy your leg can have is Potential energy.
<span>Copernicus decided this with more of an educated guess than anything. For example is when your standing right next to a plane it's huge Right? Well when it's flying it looks really small. He used the same reasoning for stars. Since it looks small it must be farther away.</span>
Answer:

Explanation:
Mass of block=10 kg
Applied horizontal force =F=20 N
Friction force=f=10 N
We have to find the acceleration of block.
Net force=Applied horizontal force-friction force

Where F= Horizontal force
f=Friction force
m=Mass of object
a=Acceleration of object


Hence, the acceleration of the block=