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Shalnov [3]
3 years ago
6

A sled starts at rest with 51,450 j of potential energy. after traveling part of the way down the slope, the sled has 32,781 j o

f potential energy. if there is no friction, what is the kinetic energy of the sled?
Mathematics
2 answers:
I am Lyosha [343]3 years ago
8 0
In a mechanical system, it is a law that energy should be conserved. In this case, what is the initial energy should be equal to the total energy after the motion happened. We do as follows:

PE(at rest) = KE(during motion) + PE(after motion)
51450 J = KE(during motion)  + 32781 J
KE(during motion) = 18669 J
Dmitrij [34]3 years ago
4 0

Answer:

The Kinectic energy of the sled is 18669j

Step-by-step explanation:

From the above question.

Because the sled starts at rest ,

The total energy of the sled = 51,450j

The potential energy ( P.E) after traveling down the slope = 32,781 j

Total energy = Potential energy + Kinectic Energy

Kinectic Energy = Total energy - Potential Energy

Kinectic energy = 51,450 j - 32,781 j

= 18669j

Therefore, the Kinectic Energy of the sled = 18669j

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Please help.
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250 smaller boxes

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5 0
3 years ago
Review
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The answer is bbc or if that’s not the answer the then it’s bbl THANK ME LATERRRR
5 0
2 years ago
Squareroot(y-1) + 3 = y
jek_recluse [69]
Note:xy means x times y and x(y) means the same thing

so
first we get rid of square root then
make the equation equal to zero becaues if
xy=0 then x or/and y=0



squareroot(y-1)+3=y

isolate the squareroot
subtrac 3 from boht sides

squareroot(y-1)=y-3

square both sides (since they are equal, you should be able to square both sides and still make it true)

(squareroot(y-1))^2=(y-3)^2
(y-1)=(y-3)(y-3)
y-1=y^2-6y+9
subtrac y from both sides
-1=y^2-7y+9
add 1 to both sides
0=y^2-7y+10
find what two number multiply to make 10 and add to get -7
the answer is -2 and -5

0=(y-5)(y-2)
therfore
y-5=0
and/or
y-2=0

therefor
y=5 or/and 2 might work
let's try out 2
square root(2-1)+3=2
square root(1)+3=2
1+3=2
false
so 2 doesn't work



let's try 5
squareroot(5-1)+3=5
squareroot(4)+3=5
2+3=5
5=5
true

y=5
7 0
3 years ago
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