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
andrew11 [14]
2 years ago
8

A 1500 kg aircraft going 35 m/s collides with a 2000 kg aircraft that is parked and they stick together after the collision and

are going 15 m/s after the collision. If they skid for 112.1 m before stopping, how long (in seconds) did they skid? Hint: Are the aircraft moving at a constant velocity after the collision or do they experience an acceleration?
Physics
1 answer:
Elis [28]2 years ago
3 0

The two aircrafts are skidded for 14.9 s.

To find the answer, we need to know about the Newton's equation of motion.

<h3>What is the Newton's equation that relates velocity, distance, acceleration and time?</h3>

As per Newton's equation of motion

  • V²-U²= 2aS
  • V= U+at
  • V= final velocity, U = initial velocity, S = distance, a= acceleration, t= time

<h3>What's the acceleration of the aircrafts that skidded from 35 m/s after the collision for 112.1 m before achieving 15 m/s?</h3>
  • Here, U = 35 m/s, V = 15m/s, S= 112.1 m
  • So, 15²- 35²= 2a×112.1= 224.2a

=> a= -1000/224.2= -4.5 m/s²

<h3>What's the time taken to stop if these aircrafts are de-accelerated by 4.5 m/s² from 35m/s?</h3>
  • Here, U = 35 m/s, V=15 m/s a= -4.5 m/s²
  • 35= 15+(-4.5)t

=> t= 20/4.5 = 4.4 s

Thus, we can conclude that the two aircrafts are skidded for 4.4 s.

Learn more about the Newton's equation of motion here:

brainly.com/question/25545050

#SPJ1

You might be interested in
Researcher measures the thickness of a layer of benzene (n = 1.50) floating on water by shining monochromatic light onto the fil
earnstyle [38]

Answer:

Minimum thickness; t = 9.75 x 10^(-8) m

Explanation:

We are given;

Wavelength of light;λ = 585 nm = 585 x 10^(-9)m

Refractive index of benzene;n = 1.5

Now, let's calculate the wavelength of the film;

Wavelength of film;λ_film = Wavelength of light/Refractive index of benzene

Thus; λ_film = 585 x 10^(-9)/1.5

λ_film = 39 x 10^(-8) m

Now, to find the thickness, we'll use the formula;

2t = ½m(λ_film)

Where;

t is the thickness of the film

m is an integer which we will take as 1

Thus;

2t = ½ x 1 x 39 x 10^(-8)

2t = 19.5 x 10^(-8)

Divide both sides by 2 to give;

t = 9.75 x 10^(-8) m

8 0
3 years ago
a catcher "gives" with the ball when he catches a 0.196 kg baseball moving at 31 m/s. if he moves his glove a distance of 5.32 c
Aloiza [94]

Answer:

3540.5N

Explanation:

Step one:

given data

mass m= 0.196kg

speed  v= 31m/s

distance r= 5.32cm = 0.0532m

Step two

The expression relating force, mass, velocity and distance is

F= mv^2/r

substitute we have

F=0.196*31^2/0.0532

F=0.196*961/0.0532

F=188.356/0.0532

F=3540.5N

6 0
3 years ago
Which of the following units is the SI unit of velocity? a. meter c. meter per second b. meter·second d. second per meter
enot [183]
C. meter per second

Velocity and speed share the same SI unit.
5 0
3 years ago
What is the gravitational potential energy of a 5 kg box if it is lifted 3 m from the floor?
Murrr4er [49]

Answer:

Its gravitational potential energy is 117.6 joules.

Explanation:

5 0
2 years ago
A rubber ball that sits motionless near the edge of a tall bookshelf has no kinetic energy. However, it does have mechanical
klio [65]

It is possible because the rubber ball has mechanical energy which is equal to potential energy.

<h3>What is mechanical energy?</h3>

Mechanical energy of an object is the total energy possessed by the object, including the potential energy and the kinetic energy.

M.A = K.E + P.E

<h3>What is kinetic energy?</h3>

Kinetic energy is the energy possessed by an object due to its motion.

<h3>What is potential energy?</h3>

Potential energy is the energy possessed by an object due to its position.

When kinetic energy (K.E) = 0

M.A = P.E

Thus, it is possible because the rubber ball has mechanical energy which is equal to potential energy.

Learn more about mechanical energy here: brainly.com/question/24443465

8 0
2 years ago
Other questions:
  • calculate the density of a neutron star with a radius 1.05 x10^4 m, assuming the mass is distributed uniformly. Treat the neutro
    9·1 answer
  • A tectonic plate near Niihau, an island in Hawaii, grows at an average rate of 11 cm/year. If the rate of plate expansion double
    7·2 answers
  • PNEWTON<br> What is the ist law of motion?
    12·1 answer
  • If a quasar is moving away from us at v/c = 0.8, what is the measured redshift?
    13·1 answer
  • At which temperature does the motion of atoms and molecules stop?
    11·1 answer
  • 12. If you cut a wooden block in half, the density will:
    9·2 answers
  • Two charged objects have a repulsive force of 0.050 N. If the charge of both of the objects is doubled, then what is the new for
    11·1 answer
  • Which statement is true about the circuit diagram below?
    5·1 answer
  • What is the difference in the speed of the generator with a small magnet and a generator with a large magnet?
    9·2 answers
  • Can someone list 6 advantages of renewable energy.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!