Ask question

Ask question

All categories

3 years ago

13

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?

1 answer:

Ugo [173]3 years ago

8 0

Because of conservation of energy, ep is equal to ek.
at that point ep=ek
the kinetic energy would be 32,781J

You might be interested in

Molds survive best in <br> A) warm, most<br> B) dry, cold <br> C) bright, sunny<br> places

lana66690 [7]

A..........................................

3 0

3 years ago

Read 2 more answers

A device used to measure the atmospheric pressure is the barometer. true false

Angelina_Jolie [31]

True, I just learned this a week ago. Is this for Chemistry?

3 0

3 years ago

In the middle of a turn, you should _____________________. A. brake hard to maintain complete control over your vehicle B. accel

Elena L [17]

Answer:

D. Downshift to allow you to turn more sharply

3 0

3 years ago

Malika is writing an essay about the Sun. Below is the first paragraph in the essay. The Sun is an average-size star that is loc

djverab [1.8K]

The 109 Earth's the sun can hold over billion Earth's

8 0

3 years ago

Read 2 more answers

Find the unit vector in the direction of vector B=4i+2j-5k

solmaris [256]

Answer:

$\frac{4}{\sqrt{45} } i\,+\frac{2}{\sqrt{45} } j-\frac{5}{\sqrt{45} } k$

Explanation:

for the unit vector, we need to divide the given vector by its norm, because it should be in the SAME direction as the original vector, but of magnitude "1".

We notice that the norm of the given vector is:

$\sqrt{4^2+2^2+(-5)^2} =\sqrt{45}$

Then, the unit vector becomes:

$\frac{4}{\sqrt{45} } i\,+\frac{2}{\sqrt{45} } j-\frac{5}{\sqrt{45} } k$

7 0

3 years ago