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
laila [671]
3 years ago
10

Austin's truck has a mass of 2000 kg when traveling at 22.0 m/s, it brakes to a stop in 4.0 s. show that the magnitude of the br

aking force acting on the truck is 11,000 n

Mathematics
2 answers:
olga2289 [7]3 years ago
5 0
Since F=m•a, you want to show that a = -5.5

Andrei [34K]3 years ago
5 0

Since the truck was in motion before the brakes were applied, it will decelerate within the 4s before coming to a stop. Hence the acceleration is -a\:ms^{-2}.

When the truck comes to a stop, It will have a final velocity of v=0\:ms^{-1}.

Also the initial velocity is 22.0 m/s. This means, u=22.0\:ms^{-1} and time,  t=4s.


We can use the relation,

v=u+at

to determine the acceleration of the truck.

Let us now plug in all the values to obtain,

0=22.0+(-a)(4)

\Rightarrow -22.0=-4a

\Rightarrow \frac{-22.0}{-4}=a


\Rightarrow a=5.5 ms^{-2}

Using the relation,

F=ma

the magnitude of the braking force is

F=2000 \times 5.5 N=11000N

You might be interested in
A group of engineers is building a parabolic satellite dish whose shape will be formed by rotating the curve y=ax2 about the y-a
Blizzard [7]

Answer:

Step-by-step explanation:

See attached file .

7 0
3 years ago
3a2 + 2a + 2a2 is equal to​
yanalaym [24]

Answer:

  5a^2 +2a

Step-by-step explanation:

Like terms are ones with the same exponent of x. They can be combined.

  3a^2 +2a +2a^2

  = (3a^2 +2a^2) +2a

  = (3+2)a^2 +2a

  = 5a^2 +2a

4 0
2 years ago
Read 2 more answers
What is the value of i^20+1?<br><br> A. 1<br> B. -1<br> C. -i<br> D. i
Svetllana [295]
I’m thinking b would be it i’m not so sure
7 0
2 years ago
WILL MARK BRAINLIEST !! HELP ASAP
ZanzabumX [31]
What's the point of brainliest .
4 0
3 years ago
There are 10 cards. Each card has one number between 1 and 10, so that every number from 1 to 10 appears once.
pychu [463]

Answer:

When a card is chosen at random with replacement five times, X is the number of times a prime number is chosen.          Here the card is chosen with replacement.  This implies probability for choosing a prime number remains the same as the previously drawn card is replaced.

The sample space= {1,2,3,4,5,6,7,8,9,10}

Prime numbers = {2,3,5,7}

Prob for drawing prime number = 4/10 = 0.4

is the same when replacement is done.

Also there are two outcomes either prime or non prime.  Hence in this case, X the no of times a prime number is chosen, is binomial with p =0.4 and q = 0.6 and n=5


When a card is chosen at random without replacement three times, X is the number of times an even number is chosen.

Prob for an even number = 0.5

But after one card drawn say odd number next card has prob for even number as 5/9 hence each draw is not independent of the other.  Hence not binomial.

When a card is chosen at random with replacement six times, X is the number of times a 3 is chosen.

Here since every time replacement is done, probability of drawing a 3 remains constant = 1/10 = 0.3

i.e. each draw is independent of the other and there are only two outcomes , 3 or non 3. Hence here X is binomial.

When a card is chosen at random with replacement multiple times, X is the number of times a card is chosen until a 5 is chosen

Here X is the number of times a card is chosen with replacement till 5 is chosen.  This is not binomial.  Here probability for drawing nth time correct 5 is  P(non 5 in the first n-1 draws)*P(5 in nth draw) = 0.1^(n-1) (0.9)

Because nCr is not appearing i.e. 5 cannot appear in any order but only in the last draw, this is not binomial.

Step-by-step explanation:


6 0
3 years ago
Other questions:
  • Which of the following have two congruent parallel bases?
    5·1 answer
  • What is the prime factorization of 102
    7·1 answer
  • An express elevator starts on the 5th floor and descends 8 floors. Which equation shows the correct computations for finding the
    6·2 answers
  • Based on the model ​N(1154​,81​) describing steer​ weights, what are the cutoff values for
    13·1 answer
  • PLEASE HELP ME ASAP!!!!
    9·2 answers
  • Expand the following. In other words, remove the parentheses (brackets):
    6·1 answer
  • PLEASE HELP !!! WILL MARK BRAINLIEST TO WHOEVER GETS IT RIGHT !!
    9·2 answers
  • 44% of the 25 buildings in the Forum are preserved. How many buildings are preserved?
    7·1 answer
  • I don't exactly remember how to do this
    15·1 answer
  • I'll mark you as a brainliest and I'll follow you if you answer my question. MULTIPLE CHOICE. Choose the letter of the correct a
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!