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
Assoli18 [71]
3 years ago
7

Ms. Terry Novel is driving down the highway at 26 m/s when the driver sees the light ahead turn yellow. It takes the driver 0.3

s to react and the maximum braking acceleration of her car is 5.3 m/s2. If the light stays yellow for a total of 4 seconds, how far does she travel in this time?
Physics
1 answer:
Ket [755]3 years ago
7 0

Answer:

67.8 m.

Explanation:

For 0.3 sec which is the response time , he will keep on moving with velocity

undiminished or at 26 m/s .

Distance travelled during this period

= 26 x .3 =7.8 m

For rest of the time ie during 4 - .3 = 3.7 s , he decelerates with deceleration of 5.3 ms⁻²  and initial velocity of 26 m/s

s = u t - 1/2 a t²

s = 26 x 3.7 - .5 x 5.3 x 3.7 x 3.7

= 96.2 - 36.28

= 60 m approx.

Total distance travelled

=60 + 7.8 = 67.8 m.

You might be interested in
How much does a 59 kg woman weigh on earth?
leonid [27]
9.8........................
5 0
3 years ago
Read 2 more answers
what does it mean if the coefficient of friction is greater? for example,a coefficient of friction of 0.1 compared to 0.7
Sergeu [11.5K]
Well, 0.1 is actually less than 0.7, but I understand what you're asking.

The coefficient of friction describes the relationship between two surfaces
that are sliding by each other.  The higher the coefficient of friction is, the
'rougher' the meeting is, and the harder it is for one to slide over the other. 
A skate blade against ice has a very low coefficient of friction.  Sandpaper
against blue jeans has a high coefficient of friction.

A higher coefficient of friction means that when one thing is sliding over
the other one, friction robs more energy from the motion.  It's harder to
push one thing over the other one, and when you let go, the moving one
slows down and stops sooner.

Air resistance is actually an example of friction.  It prevents falling things
from falling as fast as they would if there were no air. The coefficient of
friction when something moves through air is pretty low.  If the same
object were trying to move through molasses or honey, the coefficient
of friction would be greater.

Friction robs energy, and turns it into heat.  So, especially in machinery with
moving parts, we want to make the coefficient of friction between the moving parts
as small as possible.  That's what the OIL in a car's engine is for.
3 0
3 years ago
Read 2 more answers
The wavelength of a wave is the horizontal distance from a ________ to an adjacent ________.
goldenfox [79]
<span>A. crest, crest

hope im right!(: </span>
5 0
3 years ago
Read 2 more answers
Heated air molecules in a hot air balloon soon carried thermal energy to the top of the balloon. this is an example of...
aliina [53]
This is an example of conduction
8 0
3 years ago
The lifecycle of a star, including the sun, is controlled by the blank of the star. A. Ending mass B. Ending density C. Initial
Maru [420]
A star's life cycle is determined by its mass. The larger its mass, the shorter its life cycle. A star's mass is determined by the amount of matter that is available…so initial mass I think
6 0
3 years ago
Other questions:
  • True or false? Once the sun explodes, the whole solar system will go with it.
    8·1 answer
  • Critical thinking requires that _______.
    12·1 answer
  • block of mass m sits at rest on a rough inclined ramp that makes an angle with the horizontal. What must be true about normal fo
    9·1 answer
  • THIS IS ME BEWARE UGLINESS
    9·2 answers
  • The age of the universe is thought to be about 14 billion years. Assuming two significant figures, write this is powers of ten i
    14·1 answer
  • Which of the following are not units used to measure energy?
    9·1 answer
  • What can you infer from the fact that metals are good conductors of electricity?
    12·2 answers
  • Help this was due yesterday...
    7·2 answers
  • As the number of resistors in a parallel circuit is increased, what happens to the
    6·1 answer
  • Please help with these questions
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!