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
kow [346]
3 years ago
11

An empty 2,500 kg train car is headed northbound at a velocity of 5 m/s. Ahead of the first car, an empty 1,500 kg car is headed

northbound on the same track at 1 m/s. The faster train bumps into the slower one, and they combine into one train. What is the velocity of the two-car train?
Physics
1 answer:
Tema [17]3 years ago
9 0

Let the mass of 2500 kg car be m_1 and it's velocity be v_1 and the mass of 1500 kg car be m_2 and it's velocity be v_2 .

After the bumping the mass be M and it's velocity be V.

     By law of conservation of momentum we have

                   m_1v_1+m_2v_2 = MV

                    2500 * 5 + 1500 * 1=4000 * V

                    V = 14000/4000 = 7/2 = 3.5 m/s

So the velocity of the two-car train = 3.5 m/s

You might be interested in
high school physics, no need detail explain, just give the answer, but you have to make sure thank you
Goshia [24]

Answer:many questions add point

6 0
3 years ago
If a Stone with an of original velocity of zero is falling from a ledge and takes eight seconds to hit the ground what is the fi
DaniilM [7]
Let t=time to reach the ground=8 secs, g= acceleration of gravity. The speed v on reaching the ground is gt=8g=78.4 m/s where g=9.8 m/s/s approx.
3 0
3 years ago
Calculate the radius of each ball to the nearest tenth. Use the formula r = d/2 where r is the radius and d is the diameter. Rec
erma4kov [3.2K]

Answer:

What is the radius of the table tennis ball?

 ⇒ 2.1 cm  

What is the radius of the golf ball?

2.0  cm

Explanation:

divide the radius and round it to the nearest 10th place..... but hope that help ;)

8 0
3 years ago
Read 2 more answers
A ball is thrown upward.
valentina_108 [34]

Answer:

It is 10.75

Explanation:

8 0
3 years ago
57.9 g of gold has a volume of 3 cm³ what is the density of gold in g/ centimeters cubed
Grace [21]
D=m÷v

so density would be 57.9 ÷ 3 = 19.3 g/cm³
7 0
3 years ago
Read 2 more answers
Other questions:
  • A 65 kg students is walking on a slackline, a length of webbing stretched between two trees. the line stretches and sags so that
    7·2 answers
  • Imagine you have been asked to create an experimental design to test the hypothesis that talking on a cell phone impairs driving
    14·2 answers
  • What would we do if we didn't have solar energy?
    12·2 answers
  • A free body diagram of a brick on an inclined plane is shown below. What is the mechanical advantage of the inclined plane?
    9·1 answer
  • Ultrasound with a frequency of 4.257 MHz can be used to produce images of the human body. If the speed of sound in the body is t
    12·1 answer
  • Please help ASAP! Willing to give brainliest.
    14·2 answers
  • A horizontal water jet at 70˚F issues from a circular orifice in a large tank. The jet strikes a vertical plate that is normal t
    11·1 answer
  • A Canadian college student who has taken an astronomy class goes home for the holidays and persuades his parents to let him borr
    6·1 answer
  • On the left is a drawing of what scientist Thomas Young demonstrated in the early nineteenth century when he conducted an experi
    14·1 answer
  • How does creativity affect scientific work?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!