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
vagabundo [1.1K]
3 years ago
15

Two cars are heading towards one another . Car a is moving with an acceleration of 11. And carb is moving at -4 m/s^2. The cars

are at rest and seperated witha distance of s=1400m. What time do the cars meet?
Physics
1 answer:
Ahat [919]3 years ago
5 0

Answer:

13.7 s

Explanation:

The position at time t of car A can be written as follows:

x_A (t) = \frac{1}{2}a_At^2

where

a_A = 11 m/s^2 is the acceleration of car A

The position of car B instead can be written as

x_B(t) = d+\frac{1}{2}a_B t^2

where

a_B = -4 m/s^2 is the acceleration of car B

d = 1400 m is the initial separation between the cars

The two cars meet when

x_A = x_B

Using the two equations above,

\frac{1}{2}a_A t^2 = d + \frac{1}{2}a_B t^2\\\frac{1}{2}t^2 (a_A - a_B) = d\\t=\sqrt{\frac{2d}{a_A-a_B}}=\sqrt{\frac{2(1400)}{11-(-4)}}=13.7 s

You might be interested in
What pattern is seen on the moon from earth?
igomit [66]

If you mean pattern designs it’s rocky bumpy and you can see the circle patterns

If you mean phases the here’s a picture

7 0
2 years ago
3.<br> is the force on a dropped ball.<br> gravity<br> acceleration
Oduvanchick [21]

Answer:

Speeding up While Falling Down

Gravity is a force that pulls objects down toward the ground. When objects fall to the ground, gravity causes them to accelerate. Acceleration is a change in velocity, and velocity, in turn, is a measure of the speed and direction of motion.

mark me as brainliest

Explanation:

5 0
3 years ago
An athelete runs some distance before taking a long jump because : give answer
insens350 [35]
Hi Pupil Here's your answer ::



➡➡➡➡➡➡➡➡➡➡➡➡➡

An Athelete run some distance before taking a long jump because by running the Athelete gives himself larger inertia of motion.


⬅⬅⬅⬅⬅⬅⬅⬅⬅⬅⬅⬅⬅


Hope this helps .....

3 0
3 years ago
Why do tectonic plates move??
HACTEHA [7]
because they are floating on top of the liquid mantle.
4 0
3 years ago
A ventriloquist is able to convince you that words are coming from his dummy’s mouth because the dummy’s mouth movements match t
Nataly [62]

Answer:

principle of contiguity

Explanation:

The Law of Contiguity states that after events occur together (in spatio-temporal proximity), the re-occurrence of just one of the event awakens the 'memory' of the others. It is employed in a great number of scientific theories of learning, memory, and knowledge.

3 0
3 years ago
Other questions:
  • An object is dropped from a height of 75.0 m above ground level. (a) Determine the distance traveled during the first second. (b
    7·1 answer
  • The Young’s modulus of nickel is Y = 2 × 1011 N/m2 . Its molar mass is Mmolar = 0.059 kg and its density is rho = 8900 kg/m3 . G
    5·1 answer
  • Could someone help me with this please?
    12·2 answers
  • Pleaseeee help!!!! I will mark you as brainlinest for correct answer!!!!!!!
    11·1 answer
  • We know that the law of conservation of energy states that energy can not be created or destroyed. It only changes form. Conside
    10·2 answers
  • Determine the velocity that a car should have while traveling around a frictionless curve of radius 100m and that is banked 20 d
    6·1 answer
  • When a baseball player swings a bat slowly as part of their warm up, that is an example of ____________________________ stretchi
    8·1 answer
  • PLEASE HELP!!!! ): PLEASE!!!
    10·1 answer
  • Please answer please answer please answer
    12·2 answers
  • How did Aristotle contribute to science?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!