The kinetic energy of a book on a shelf is equal to the work done to lift the book to the shelf is false. The kinetic energy on the shelf is zero because it is not in action.

7 0

3 years ago

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A ball is dropped from a tower that is 206 m high, How long does it take to reach the ground?

Slav-nsk [51]

It will take 6.42 s for the ball that is dropped from a height of 206 m to reach the ground.

From the question given above, the following data were obtained:

Height (H) = 206 m

NOTE: Acceleration due to gravity (g) = 10 m/s²

The time taken for the ball to get to the ground can be obtained as follow:

H = ½gt²

206 = ½ × 10 × t²

206 = 5 × t²

Divide both side by 5

$t^{2} = \frac{206}{5}\\\\ t^{2} = 41.2$

Take the square root of both side

$t = \sqrt{41.2}$

Therefore, it will take 6.42 s for the ball to get to the ground.

Learn more: brainly.com/question/24903556

7 0

3 years ago

Place these waves in order from shortest wavelength to longest.

dsp73

Answer:

Ocean waves, sound waves, and light waves.

Explanation:

5 0

3 years ago

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When you see a traffic light turn red, you apply the brakes until you come to a stop. if your initial speed was 14 m/s, and you

alukav5142 [94]

Average v = (initial v + final v)/2
= (14 m/s + 0 m/s)/2
= 7 m/s

Your average velocity during braking is 7 m/s

3 0

3 years ago