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Andreyy89
3 years ago
10

Question 18 (Mandatory) (2 points) Consider a ball accelerating down a hill. Which statement is true as the ball rolls down the

hill? Question 18 options: The thermal energy decreases The potential energy decreases and the kinetic energy increases The kinetic energy decreases The potential energy and the kinetic energy both increase The potential energy and the kinetic energy both decrease
Mathematics
1 answer:
notka56 [123]3 years ago
8 0

Answer: The potential energy decreases and the kinetic energy increases

Step-by-step explanation:

When a body is at rest , the Potential energy is maximum because the body is not moving and the acceleration is therefore zero but as soon as the body starts moving , it will convert the potential energy to kinetic energy , therefore the kinetic energy will therefore increase.

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Answer:

Step-by-step explanation:

Hi there! First thing I want to say is that I will have a photo attached to this problem. If you don't see it or need any more clear explanation, please don't hesitate to reach out! Anyways, I will go step by step for this problem and also include a definition.

Okay, what we have here is a right triangle, which has a 90 degree angle. And we have two sides and want to find the other side. With this problem, we will use the pythagorean theorem. The pythagorean theorem is an equation or formula that helps someone to find a side of a 90 degree right triangle, when two sides are presented.

Formula: a² + b² = c²

a would be the height of the triangle, b would be the length, and c is the hypotenuse of the triangle.

What we have so far is b and c. b is 3 and c is 5. So with that in mind we will replace b and c with the numbers we are given.  And then solve from there...

a² + b² = c²

a² + 3² = 5²

a² + 9 = 25

<u>      -9     -9</u>

a² = 16

\sqrt{a^{2} } = \sqrt{16}

a = 4

There you go! And you can always go back and check your answer! I hope this helped, if not please ask and don't be afraid! And I again have attached a picture of the work! Have a great day!

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