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
antiseptic1488 [7]
3 years ago
7

The engine in an imaginary sports car can provide constant power to the wheels over a range of speeds from 0 to 70 miles per hou

r (mph). At full power, the car can accelerate from zero to 32.0mph in time 1.10s .A)At full power, how long would it take for the car to accelerate from 0 to 64.0mph ? Neglect friction and air resistance. =4.40sPart BA more realistic car would cause the wheels to spin in a manner that would result in the ground pushing it forward with a constant force (in contrast to the constant power in Part A). If such a sports car went from zero to 32.0mph in time 1.10s , how long would it take to go from zero to 64.0mph ?am not sure how to do part B
Physics
1 answer:
Inessa05 [86]3 years ago
7 0

Answer:

a) 4.40 s

b) 2.20 s

Explanation:

Given parameters are:

At constant power  ,

initial speed of the car, v_0=0

final speed of the car, v=32 mph

At full power,

initial speed of the car, v_0=0

final speed of the car, v=64 mph

a)

At constant power, KE = \frac{1}{2} mv^2

At full power, KE = \frac{1}{2} m(2v)^2

So KE_f = 4KE_i

So, time to reach 64 mph speed is 4 times more than the initial time

t = 4*1.10 =4.40 s

b)

v=v_0+at\\a=\frac{v-v_0}{t}=\frac{32-0}{1.1/3600}=104727.27 miles/hours^2

For final 64 mph speed,

v=v_0+at\\t=\frac{v-v_0}{a}=\frac{64-0}{104727.27} = 6.111*10^{-4} hours = 6.111*10^{-4}*3600=2.20 s

You might be interested in
A giant star has a luminosity of 300 its color is most likely to be
amm1812
<span>The correct answer is blue. If you look at a luminosity star chart, called the Hertzsprung Russell Diagram, you will see the measurement of luminosity on the left side, and you will see a curve of stars with different colors (which correlate to the colors of the stars). Look for 30 on the luminosity measurement (look between 1 and 100). Then, move horizontally across the diagram until you hit the stars, whose color will be blue. Thus, blue is the answer.</span>
5 0
3 years ago
As the hot gas from a space shuttle is released downward, what does this cause to happen?
andrew11 [14]

Answer:

D. Upward force on the shuttle

Explanation:

The hot gas from space shuttles released downward causes an upward force on the shuttle and propels it up the more.

  • This hot gas is produced from super cooled oxygen and hydrogen tanks within the shuttle.
  • The upward force on the shuttle allows the craft to escape the gravitational pull of the earth on the shuttle
  • Special level of rapid acceleration must be attained for the shuttle to escape the earth pull.
8 0
3 years ago
Why is it important for an engineer who is designing a new home-cooling/heating system to have knowledge about the transfer of h
julia-pushkina [17]

Answer:

In the explanation :)

Explanation:

Heat is a concept that is important to understand in various engineering fields. It is particularly relevant for civil, mechanical and chemical engineers because heat transfer plays a key role in material selection, machinery efficiency and reaction kinetics, respectively.

3 0
3 years ago
Read 2 more answers
Select all that apply.
Nana76 [90]

Answer: It is both B and D

Select all that apply.

At night, thermal energy moves _____.

from space to the atmosphere

from the land to the atmosphere

from the atmosphere to the land

from the atmosphere to space

3 0
3 years ago
Read 2 more answers
The force that acts on an object lying on a surface, acting in a direction perpendicular to the surface is called ____________​
DanielleElmas [232]
If it is on land gravitational force
If it is on water thrust
8 0
2 years ago
Other questions:
  • If a bat with a mass of 5 kg and acceleration of 2 m/s2 hits a ball whose mass is 0.5 kg in the forward direction, what is the r
    5·2 answers
  • I’m not sure how to do 30, could someone pls help?
    8·1 answer
  • A bags shed and he balls stand slap DC dmss
    5·1 answer
  • Gabriella got a burn on her arm from a chemical spill and rinsed the area thoroughly with water. Which piece of safety equipment
    8·2 answers
  • What kind of charge does an object have if it has gained electrons
    11·2 answers
  • W=90 kg×4n/kg<br>Please halp me i need it ​
    9·1 answer
  • You are leaving for a party at your cousin’s house in a city that is 150 km away. You will travel at an average rate of 50 km/hr
    12·2 answers
  • When resting, a person has a metabolic rate of about 3.0X10^5 joules per hour. The person is submered neck deep into a tub conta
    10·1 answer
  • A snail crawls 300 cm in 1 hour. Calculate the snail's speed in each of the following units. a. centimeters per hour (cm/h) b. c
    10·1 answer
  • What happens to the position of an object as an unbalanced force acts on?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!