Answer: 72200
Explanation:
First you must find the height for this is on an inclined hill using:
h=Lsin(angle) —> 28.0sin(11.0) = 5.34
Now you would just use the PE equation (mgh) because you are finding ME and when you starting from the top KE=0, showing that what ever answer you get from PE would equal the same for ME.
Using mgh:
m=1380
g=9.80
h=5.34
(1380)(9.8)(5.34)
=72218.16
*Rounding to the 3rd=72200
Hope this helps :)
I believe the answer is A) Less work in less time.
21. light changes its direction when travelling through a new medium because denser mediums have a higher angle of refraction.
Answer:
your answer is B. The velocity could be in any direction, but the acceleration is in the direction of the resultant force
