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
Llana [10]
3 years ago
15

A moving freight car runs into an identical car at rest on the track. The cars couple together. Compared to the velocity of the

first car before the collision, the velocity of the combined cars after the collision is Group of answer choices
Physics
1 answer:
Leno4ka [110]3 years ago
8 0

Answer:

one half as large , initial velocity is two times larger

Explanation:

Momentum is conserved.

p₁ + p₂ = p₁' + p₂'

m₁v₁ + m₂v₂ = m₁v₁' + m₂v₂'

m₁ = m₂ =m , v₂= 0

v₁' =v₂'

mv₁ = 2mv₁'

v₁ = 2v₁'

You might be interested in
A monster truck enters a freeway with a speed of 0 m/s and accelerates at a rate of 25 m/s2 in 5 seconds. How far does the car t
Furkat [3]

Answer:

312.5

Explanation:

we know that

s= ut + 1/2 at^2

= 0*5+1/2*25*5^2

= 0+ 625/2

=312.5

plz mark as brainalist

5 0
3 years ago
What is the net force on this object?
vaieri [72.5K]

Answer:

200 newtons

Explanation:

because the sub air that would pull the force down by all of the mass of the sub air go down by that 400 newtons there for your anwer is 200 newtons. because 600-400=200

8 0
3 years ago
Read 2 more answers
When falling through the air, which of the following objects will hit the ground first?
defon
A cell phone! Hope this helps!
6 0
3 years ago
Read 2 more answers
A projectile is launched with an initial speed of 60.0 m/s at an angle of 30.0° above the horizontal. The projectile lands on a
vodka [1.7K]

Answer:

51.96 m/s^-1

Explanation:

a) see the attachment

b) As we know the velocity of the projectile has two component, horizontal velocity v_ox. and vertical velocity v_oy as shown in the figure. At the highest point of the trajectory, the projectile has only horizontal velocity and vertical velocity is zero. Therefore at the highest point of the trajectory, the velocity of the projectile will be  

v_ox=v_o*cosФ

       =60*cos (30)

      = 51.96 m/s^-1

3 0
3 years ago
Read 2 more answers
Es muy común que cuando se viaja hacia un río o lago se juegue "ranita", el cual consiste en lanzar una piedra horizontalmente h
shutvik [7]

Answer:

a) La piedra es lanzada desde una altura de 0,785 metros.

b) La piedra es lanzada con una velocidad inicial de 6,25 metros por segundo.

Explanation:

a) Dado que la piedra es lanzada horizontalmente, tenemos que la piedra experimenta un movimiento horizontal a velocidad constante y uno vertical uniformemente acelerado debido a la gravedad. La altura de la que fue lanzada la piedra se puede determinar mediante la siguiente ecuación cinemática:

y = y_{o}+v_{o,y}\cdot t +\frac{1}{2}\cdot g\cdot t^{2} (1)

Donde:

y - Altura final, medida en metros.

y_{o} - Altura inicial, medida en metros.

v_{o,y} - Componente vertical de la velocidad inicial, medida en metros por segundo.

t - Tiempo, medido en segundos.

g - Aceleración gravitacional, medida en metros por segundo cuadrado.

Si sabemos que y = 0\,m, v_{o,y} = 0\,\frac{m}{s}, t = 0,4\,s y g = -9,807\,\frac{m}{s^{2}}, entonces la altura inicial de la piedra es:

y_{o} = y-v_{o,y}\cdot t -\frac{1}{2}\cdot g\cdot t^{2}

y_{o} = 0\,m-\left(0\,\frac{m}{s} \right)\cdot (0,4\,s)-\frac{1}{2}\cdot \left(-9,807\,\frac{m}{s^{2}} \right) \cdot (0,4\,s)^{2}

y_{o} = 0,785\,m

La piedra es lanzada desde una altura de 0,785 metros.

b) Ahora, obtenemos el componente horizontal de la velocidad inicial a partir de la siguiente ecuación cinemática:

v_{o,x} = \frac{x-x_{o}}{t} (2)

Donde:

x_{o}, x - Posiciones horizontales iniciales y finales, medidas en metros.

t - Tiempo, medido en segundos.

Si tenemos que x_{o} = 0\,m, x = 2,5\,m y t = 0,4\,s, entonces el componente horizontal de la velocidad inicial es:

v_{o,x} = \frac{2,5\,m-0\,m}{0,4\,s}

v_{o,x} = 6,25\,\frac{m}{s}

La piedra es lanzada con una velocidad inicial de 6,25 metros por segundo.

4 0
3 years ago
Other questions:
  • A film with n = 1.60 is deposited on glass. what is the thinnest film that will produce constructive interference in the reflect
    15·1 answer
  • The motor in a refrigerator has a power output of 400 W. If the freezing compartment is at 273 K and the outside air is at 306 K
    15·1 answer
  • According to the law of conservation of mass, which of these is true.
    6·1 answer
  • Is the magnitude of the acceleration of the center of mass of spool A greater than, less than, or equal to the magnitude of the
    5·1 answer
  • Two identical billiard balls traveling at the same speed have a head-on collision and rebound. If the balls had twice the mass,
    8·1 answer
  • A raft of mass 180kg carries two swimmers mass of 50kg and 80kg. The raft is initially floating at rest. The two swimmers simult
    7·1 answer
  • A box with a mass of 7 kilograms is pushed up a ramp to a height of 5 meters. What is the work done against the force of gravity
    9·2 answers
  • Any four difference between speed and acceleration ​
    5·1 answer
  • Please help me with this! i will give brainliest if you get it right! NO LINKS OR IM REPORTING
    13·1 answer
  • A. An object takes 5 s to reach the
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!