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Vanyuwa [196]
3 years ago
14

A roller skate coming to a stop because of

Physics
1 answer:
Elden [556K]3 years ago
8 0

Answer:

Laws of the Park: Newton's First Law

If you understand how a skateboard starts and stops, then you already know something about Newton's first law of motion. This law was developed by English scientist Isaac Newton around 1700.

Explanation:

Hope this helps..

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If a ball is thrown straight up, where is its acceleration the<br> greatest
Lapatulllka [165]

It has acceleration while it's in your hand and you're in the process of flinging it, but we don't know how much.

It has acceleration ... pretty big ... during the short time between hitting the first blade of grass and coming to rest in the dirt, at the end of its trip.

From the time it leaves your hand until it hits the grass on the way down, its has the same constant, continuous acceleration ... 9.8 m/s^2 downward, the acceleration of gravity.

The greatest acceleration is probably at the end of the trip, after it hits the grass, and its speed drops to zero in a tiny fraction of a second.

3 0
4 years ago
This is a Physics worksheet. please help.
natulia [17]

i think the answer is A

7 0
3 years ago
3. The following sound waves have what velocity? (convert cm into m in your calculations.)
mestny [16]

The sound waves with the frequency 20 Hz, 200 Hz, 2,000 Hz, and 20,000 Hz have a velocity of 344 m/s.

<h3>What are sound waves?</h3>

A sound wave is a sample resulting from the motion of strength traveling thru a medium (inclusive of air, water, or every other liquid or stable matter) because it propagates from the supply of the sound. Sound waves are created and convey strain waves, for example, a cellphone.

The frequency can be given as:

Frequency = Velocity/ Wavelength

Velocity = Frequency * Wavelength

The velocity of the following sound waves is given as:

  • Frequency = 20 Hz

Wavelength = 17.2 m

Velocity = 20 * 17.2 m/s

Velocity = 344 m/s

  • Frequency = 200 Hz

Wavelength = 1.72 m

Velocity = 200 * 1.72 m

Velocity = 344 m/s

  • Frequency = 2,000 Hz

Wavelength = 17.2 cm = 0.172 m

Velocity = 2,000 * 0.172 m/s

Velocity = 344 m/s

  • Frequency = 20,000 Hz

Wavelength = 1.72 cm = 0.0172 m

Velocity = 20,000 * 0.0172 m/s

Velocity = 344 m/s

Read more about the  sound waves:

brainly.com/question/13105733

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6 0
2 years ago
Examine the scenario. Two neutral objects, a balloon and a sweater, are rubbed against each other. Which choice most accurately
Ne4ueva [31]

Electrons move from the sweater to the balloon. The sweater becomes positively charged, while the balloon becomes negatively charged.

Explanation:

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  • Consequently, when you rub a balloon on Sweater, this causes the electrons to move from the Sweater to the balloon's surface.
  • The rubbed part of the balloon now acquired  a negative charge. Objects made of rubber, such as the balloon, are basically electrical insulators, meaning that they resist electric charges flowing through them.
  • This is why only part of the balloon may have a negative charge (where the wool rubbed it) and the rest may remain neutral after electrostatic process.
4 0
3 years ago
Not really understanding this, wouldn't mind some help. : )
ddd [48]

Explanation:

Given

Mass (m) = 1200 kg

Acceleration (a) = 3 m/s²

Force (F) = ?

We know

F = m * a

= 1200 * 3

= 3600 Newton.

Therefore the force acting on the car is 3600 Newton.

Hope it will help):)

5 0
3 years ago
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