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
choli [55]
3 years ago
9

A 4400 Kg Track Travelling at Intial speed 52m\s can be stopeed in 42 sec. By Gently Break , also the track can be stoped in 7.6

m\s if the driver hit the wall
Physics
1 answer:
AlladinOne [14]3 years ago
7 0

Answer:

-4,651.42N

Explanation:

Since we are not asked what to find, we can calculate the force applied by the track as shown;

F = ma

F = m(v-u)/t

Substitute the given value

F = 4400(7.6-52)/42

F = 4400(-44.4)/42

F = -4,651.43N

Hence the required force is -4,651.42N

You might be interested in
PLEASE HELP!!! I'm dumb lol.
Len [333]

Answer:

A theory or hypothesis does not necessarily provide an accurate scientific explanation to any topic but predicts what can happen.

Explanation:

7 0
2 years ago
Read 2 more answers
A person drops a brick from the top of a building. The height of the building is 400 m and the mass of the brick is 2.00 kg. Wh
DaniilM [7]
-- It takes the brick 8.9 seconds to reach the ground. 

-- At the instant of the "splat", it's falling at 89 m/s.

-- The mass doesn't matter. If not for air resistance, every object
    would fall at the same rate.  The answer is the same for a feather,
    a rubber chicken, a brick, or a school bus.
5 0
3 years ago
Do any of the galaxies appear to be closer to each other as your universe expands? What does this say about the possibility of g
Luda [366]

Explanation:

In local galactic group the force of expansion of universe is overcome by the force of attraction due  to gravity. Best example is our own galaxy milky way and another giant galaxy in our local group Andromeda. Andromeda having enormous gravity is pulling milky way towards itself, overcoming the force of expansion.

So, there  are possibilities of collision despite the expansion of universe at a rapid pace. It is estimated that the milky way and Andromeda will collide each other after about 50 billion years from now.  

8 0
3 years ago
Hi! I have a word bank I need help with please!<br> I have the questions as an attachment
Katena32 [7]
Scott needs to determine the density of a metallic rod. First, he should determine the mass of his sample on the laboratory balance. Second, he should measure the volume of his sample by water displacement. Finally, he can calculate the density by dividing mass/volume. 
Hope this helped ;)
4 0
3 years ago
The Zika Virus is most dangerous to which group of people?
laiz [17]

Answer:

option D pregnant women

4 0
3 years ago
Other questions:
  • How does the circuit change when the wire is added?
    9·2 answers
  • Whats quantum physics?
    10·1 answer
  • Which best describes the current atomic model?
    11·2 answers
  • 4 The temperature at the center of the sun is 1.55 x 10' K. Express this in degrees
    8·1 answer
  • How does the overtone number relate to the standing wave pattern number
    14·1 answer
  • Your family is moving to a new home. While lifting a box 1.5 m straight up to put it on a truck, you exert an upward force of 20
    9·2 answers
  • A slab of glass 8.0 cm thick is placed upon a printed page. If the refractive index of the glass is 1.5, how far from the surfac
    7·1 answer
  • Que capacidade física consiste em deslocar o corpo no espaço o mais rápido possível, mudando o centro de gravidade de posição, s
    14·1 answer
  • Can y'all help me please?
    11·2 answers
  • Noah drops a rock with a density of 1.73 g/cm3 into a pond. Will the rock float or sink? Explain your answer.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!