1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Anastasy [175]
3 years ago
11

In a lab experiment, two identical gliders on an air track are held together by a piece of string, compressing a spring between

the gliders. While they are moving to the right at a common speed of 0.500 m/s, one student holds a match under the string and burns it, letting the spring force the gliders apart. One glider is then observed to be moving to the right at 1.300 m/s. (the string and spring both have negligible mass
Physics
1 answer:
iren2701 [21]3 years ago
6 0

Answer:

a) vfinal₂ = - 0.30 m/s  (←)

b)

Explanation:

In a lab experiment, two identical gliders on an air track are held together by a piece of string, compressing a spring between the gliders. While they are moving to the right at a common speed of 0.50 m/s, one student holds a match under the string and burns it, letting the spring force the gliders apart. One glider is then observed to be moving to the right at 1.30 m/s. (a) What velocity does the other glider have? (b) Is the total kinetic energy of the two gliders after the collision greater than, less than, or equal to the total kinetic energy before the collision? If greater, where did the extra energy come from? If less, where did the "lost" energy go?

a)

Known values:

vinitial₁ = vinitial₂ = v = 0.5 m/s

vfinal₁ = 1.30 m/s

m₁ = m₂ = m

Unknown values:

vfinal₂ = ?

According to conservative Law of Moment we have:

pfinal = pinitial

then

m*vinitial₁ + m*vinitial₂ = m*v + m*v = 2m*v = 2*m*0.5 = m   <em>(I)</em>

m*vfinal₁ + m*vfinal₂ = m*1.30 + m*vfinal₂ = m*(1.3+vfinal₂)   <em>(II)</em>

<em />

<em>If (I) = (II) we get</em>

m = m*(1.30+vfinal₂)   ⇒  vfinal₂ = (1 - 1.30) = - 0.30 m/s

vfinal₂ = - 0.30 m/s  (←)

b) In order to evaluate the kinetic energy we use the equation

Kinitial = Kinitial₁ + Kinitial₂ = (0.5*m*v²) + (0.5*m*v²) = m*v² = m*(0.5)²  

⇒   Kinitial = 0.25m

Kfinal = Kfinal₁ + Kfinal₂ = (0.5*m*1.30²) + (0.5*m*(-0.30)²)

⇒   Kfinal = 0.89m

we evaluate the ratio of the two kinetic energies, as follows:

Kfinal / Kinitial = 0.89m / 0.25m = 3.56

Finally, the final kinetic energy is greater than the initial kinetic energy.

You might be interested in
Two common terms for a decrease in velocity are
Colt1911 [192]

deceleration or rėtardation i’m pretty sure (it won’t let me say the second word but it’s correct)

6 0
3 years ago
Read 2 more answers
A sort of "projectile launcher" is shown below. A large current moves in a closed loop composed of fixed rails, a power supply,
Zarrin [17]

Answer:

wallah i don't understand anything with my stoopid brain

Explanation:

3 0
2 years ago
Charge: A piece of plastic has a net charge of +2.00 μC. How many more protons than electrons does this piece of plastic have? (
snow_lady [41]

Answer

given,

net charge = +2.00 μC

we know,

1 coulomb charge =  6.28 x 10¹⁸electrons

1 micro coulomb  charge =  6.28 x 10¹⁸ x 10⁻⁶ electron

                                         = 6.28 x 10¹² electrons

2.00 μC = 2 x 6.28 x 10¹² electrons

              = 1.256 x 10¹³ electrons

since net charge is positive.

The number of protons should be 1.256 x 10¹³ more than electrons.

hence, +2.00 μC have 1.256 x 10¹³ more protons than electrons.

6 0
3 years ago
Which rain forest is located mostly on islands
natita [175]
The tropical rain forest is located mostly on Islands. Mainly found in Africa.
6 0
3 years ago
Read 2 more answers
An element's atomic number is 58. How many protons would an atom of this element have?
agasfer [191]
58 the number of protons are the same as your atomic number<span />
4 0
3 years ago
Other questions:
  • Who developed radiometric dating? What age did he assign to the oldest rocks?
    11·1 answer
  • What is potential energy of a 10.0 kg weight suspended 3.0m above the ground?
    13·1 answer
  • Corita bounced a ball four times. She measured how high the ball bounced each time. She recorded her data in the table. Which bo
    9·2 answers
  • A person kicks a 4.0-kilogram door with a 48-newton force causing the door to accelerate at 12 meters per second squared. What i
    6·1 answer
  • g A lighter ball A with momentum PA=5.0 kg∙m/s in positive x-direction approaches a heavier ball B at rest before the collision.
    13·1 answer
  • What's the hikers average velocity during part D of the hike?
    7·1 answer
  • The electron dot diagram shows the arrangement of dots without identifying the element.
    13·2 answers
  • What do you think is the charge of the nucleus of an atom
    5·1 answer
  • Olympic gold medalist Michael Johnson runs one time around the track 400 meters in 38 seconds what is his displacement what is h
    13·1 answer
  • A cave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. The lift i
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!