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
NikAS [45]
3 years ago
13

A car starts from rest and travels for 5.0 s with a uniform acceleration of +1.5 m/s2 . The driver then applies the brakes, caus

ing a uniform acceleration of –2.0 m/s2. If the brakes are applied for 3.0 s, how fast is the car going at the end of the braking period?
Physics
1 answer:
Svetlanka [38]3 years ago
7 0

The final velocity of the car is +1.5 m/s.

Explanation:

We have to divide the problem into two parts.

In the first part, the car starts from rest and accelerates for 5.0 s. We can find the final velocity of the car after this first part using the suvat equation:

v = u +at

where

v is the final velocity

u = 0 is the initial velocity

a=+1.5 m/s^2 is the acceleration

t = 5.0 s is the time

Substituting,

v=0+(1.5)(5.0)=7.5 m/s

In the second part, the brakes are applied, so the car decelerates for 3.0 s, and the final velocity is given by

v' = v + at

where

v' is the final velocity

v = 7.5 m/s is the velocity at the beginning of this part

a=-2.0 m/s^2 is the deceleration

t = 3.0 s is the time

Substituting,

v'=7.5+(-2.0)(3.0)=+1.5 m/s

So, the final velocity is +1.5 m/s.

Learn more about accelerated motion:

brainly.com/question/9527152

brainly.com/question/11181826

brainly.com/question/2506873

brainly.com/question/2562700

#LearnwithBrainly

You might be interested in
Dr. Martin Luther King, Jr., used which method to draw attention to the civil rights movement?
lubasha [3.4K]
It is c. Hoped this helped. ~Bob Ross
7 0
3 years ago
The normal eye, myopic eye and old age
Leviafan [203]

Answer:

length f′0 when the eye is presbyopic and by a screen (the retina) at the distance d from the

Explanation:

7 0
3 years ago
Tại sao khi bị sì hơi quả bóng bay sẹp lại?
Brut [27]

Answer:

what is this language??

8 0
2 years ago
Read 2 more answers
Which of the following statement describes a nonpolar molecule
Sati [7]

Answer:

?

Explanation:

what are the statements

5 0
2 years ago
Read 2 more answers
A solenoid with 3,000.0 turns is 70.0 cm long. If its self-inductance is 25.0 mH, what is its radius? (The value of μ0 is 4π x 1
nevsk [136]

Answer:

A. 2.2*10^-2m

Explanation:

Using

Area = length x L/ uo xN²

So A = 0.7m * 25 x 10^-3H /( 4π x10^-7*

3000²)

A = 17.5*10^-3/ 1.13*10^-5

= 15.5*10^-2m²

Area= π r ²

15.5E-2/3.142 = r²

2.2*10^2m

Explanation:

5 0
3 years ago
Other questions:
  • Which of earths layers is made up of liquid metal
    10·2 answers
  • A baseball flying through the air has what kind of energy?
    6·1 answer
  • Your town is considering building a hydroelectric power plant. Describe at least two advantages and two disadvantages of this pr
    9·2 answers
  • The energy needed to get a reaction started is the
    10·1 answer
  • A 20-kg child is tossed up into the air by her parent. the child is 2 meters off ground traveling 5 m/s.
    5·1 answer
  • HELP AGAIN 10 POINTS
    5·1 answer
  • Is the speed of Earth revolving around the sun changing?
    5·2 answers
  • Please help I have no idea how to do this
    8·2 answers
  • 4. A steel rod is 5 cm x 5 cm x 120 cm. If steel has a density of 7.80 g/cm', what is the
    6·1 answer
  • Why is it important to assess flexibility both before and during a workout regimen? a. to assess flexibility progress b. to keep
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!