Where does the kinetic energy come fromwhen you roll down a hill?

Physics

1 answer:

Lapatulllka [165]3 years ago

8 0

From the change of GPE into KE. Conservation of energy tells us this.

You might be interested in

suppose a ball is thrown vertically upward. Eight seconds later it returns to its point of release. What is the initial velocity

valentinak56 [21]

The ball took half of the total time ... 4 seconds ... to reach its highest
point, where it began to fall back down to the point of release.

At its highest point, its velocity changed from upward to downward.
At that instant, its velocity was zero.

The acceleration of gravity is 9.8 m/s². That means that an object that's
acted on only by gravity gains 9.8 m/s of downward speed every second.

-- If the object is falling downward, it moves 9.8 m/s faster every second.

-- If the object is tossed upward, it moves 9.8 m/s slower every second.

The ball took 4 seconds to lose all of its upward speed. So it must have
been thrown upward at (4 x 9.8 m/s) = 39.2 m/s .

(That's about 87.7 mph straight up. Somebody had an amazing pitching arm.)

6 0

3 years ago

a concave mirror of radius of curvature 20cm produces an inverted image three times the size of an object placed on and perpendi

Elis [28]

Answer:

Check attachment for your answer

Good luck

6 0

3 years ago

What causes an atom to be neutral?

Ugo [173]

Answer:

Explanation:

If there are the same number of protons (+) as electrons (-) they will cancel out and make the atom neutral.

4 0

3 years ago

Where are a hurricanes fastest winds and heaviest rain found?

PSYCHO15rus [73]

The fastest winds and heaviest rain is found in the eye of the hurricane.

8 0

3 years ago

Which of the following material offers the lowest resistivity?

Yuki888 [10]

Lower resistivity means higher conductivity: among these materials, the best conductor is silver, therefore it must be the material with lowest resistivity among those. We can also have a look at the value of resistivity of the different materials listed in the problem, to check our answer. The resistivities of the materials are the following:
Wood: $1.00\cdot 10^{3} \Omega \cdot m$
Salt water: $2.00\cdot 10^{-1} \Omega \cdot m$
Silver: $1.59\cdot 10^{-8} \Omega \cdot m$
Lead: $2.20\cdot 10^{-7} \Omega \cdot m$
<span>We see that the material with lowest resistivity among those is silver, therefore the correct answer is silver.</span>

7 0

3 years ago

Read 2 more answers