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emmasim [6.3K]
3 years ago
8

Can someone explain kinetic friction and give an example?

Physics
1 answer:
ryzh [129]3 years ago
4 0
Kinetic friction happens when there is kinetic energy and it is coming into contact with another source. ex: a ball rolling.
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What is the speed of a vehicle that travels 50 meters in 5 seconds m/s
katrin [286]

Answer:

10m/s

Explanation:

S=D/T

S=50m/ 5sec (make sure to write correct units, they sometimes mark you on that in physics)

S=10 m/sec (be careful of what the units that they want the answer in, different story if it was m/min

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3 years ago
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An automobile is traveling on a long, straight highway at a steady 80.0 mi/h when the driver sees a wreck 190 m ahead. At that i
kozerog [31]

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a) The car’s speed just after leaving the icy portion of the road is the first part

Explanation:

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3 years ago
A large lightning bolt is observed to have a 19500 A current and move 36 C of charge. What was its duration?
Lynna [10]

Answer:

Its duration is 1.85*10⁻³ s or 1.85 ms

Explanation:

The intensity of electric current I is defined as the amount of electric charge Q (measured in Coulombs) that passes through a section of a conductor in each unit of time. The letter I is used to name the Intensity and its unit is the Ampere (A).

The intensity of electric current is expressed as:

I=\frac{Q}{t}

where:

I: Intensity expressed in Amps (A)

Q: Electric charge expressed in Coulombs (C)

t: Time expressed in seconds (s)

Being:

  • I= 19500 A
  • Q=36 C
  • t=?

Replacing:

19500 A=\frac{36 C}{t}

Solving:

19500 A*t= 36 C

t=\frac{36 C}{19500 A}

t= 1.85*10⁻³ s= 1.85 ms (being 1 s= 1,000 ms)

<u><em>Its duration is 1.85*10⁻³ s or 1.85 ms</em></u>

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3 years ago
22. State any three features of the electroscope.​
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An electroscope is made up of a metal detector knob on top which is connected to a pair of metal leaves hanging from the bottom of the connecting rod. When no charge is present the metals leaves hang loosely downward. But, when an object with a charge is brought near an electroscope, one of the two things can happen.
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3 years ago
The body system responsible for absorbing chemical energy from food is the-
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I think the answer is digestive system

Hope this helps... mark as Brainliest plz
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4 years ago
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