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
Novosadov [1.4K]
4 years ago
8

A Porsche challenges a Honda to a 400 m race. Because the Porsche’s acceleration of 3.5 m/s 2 is larger than the Honda’s 3.0 m/s

2, the Honda gets a 100-m head start—it is only 300 m from the finish line. Assume, somewhat unrealistically, that both cars can maintain these accelerations the entire distance. Who wins, and by how much time?
Physics
1 answer:
Karo-lina-s [1.5K]4 years ago
4 0

Explanation:

It is given that,

For Honda:

Initial velocity, u = 0

Initial position, x_i=0

Final position, x_f=300\ m

Acceleration, a=3\ m/s^2

Let t is the time taken by Honda. Using second equation of motion as :

x_f=x_i+ut+\dfrac{1}{2}at^2

300=0+0+\dfrac{1}{2}\times 3t^2

t = 14.14 seconds

For Porsche’s :

Initial velocity, u = 0

Initial position, x_i=0

Final position, x_f=400\ m

Acceleration, a=3.5\ m/s^2

Let t' is the time taken by Honda. Using second equation of motion as :

x_f=x_i+ut+\dfrac{1}{2}at'^2

400=0+0+\dfrac{1}{2}\times 3.5t^2

t' = 15.11 seconds

Since, the time taken by Honda is less while the time taken by Porsche's is more. So, Honda wins the race by (15.11 - 14.14 = 0.97) seconds. Hence, this is the required solution.

You might be interested in
CAN I HAVE SOME HELP PLEASE
AURORKA [14]

Answer:

By teh way is isn't it question of law or science and the picture is of what electric light or not I have read it so I was asking isn't is question of science

5 0
3 years ago
A solar panel is used to recharge a battery. The solar panel produces 0.80 W of electrical power. The panel is 20% efficient. Wh
Vlad [161]

Answer:

Input power, Ip = 4 Watts

Explanation:

Given the following data;

Power output = 0.8 Watts

Efficiency = 20%

To find the power input of the sunlight onto the solar panel;

Mathematically, the efficiency of a machine is given by the formula;

Efficiency = \frac {Out-put \; power}{In-put \; power} * 100

Substituting into the formula, we have;

20 = \frac {0.8}{Ip} * 100

20 = \frac {80}{Ip}

Cross-multiplying, we have;

20Ip = 80

Ip = \frac {80}{20}

Input power, Ip = 4 Watts

8 0
3 years ago
How long must a simple pendulum be if it is to make exactly one swing per four seconds? (That is, one complete oscillation takes
cricket20 [7]

Answer:

Length of the pendulum will be 3.987 m

Explanation:

We have given time period of the pendulum T = 8 sec

Acceleration due to gravity g=9.81m/sec^2

We have to find the length of the simple pendulum

We know that time period of the simple pendulum is given by

T=2\pi \sqrt{\frac{l}{g}}

8=2\times 3.14 \sqrt{\frac{l}{9.81}}

l=3.987m

So length of the pendulum will be 3.987 m

3 0
3 years ago
I don’t know how to explain this or if I am correct:(
Talja [164]

Answer:

c is correct

Explanation:

There are two equal forces on each sides of the rope. The greater opposing sides pull, the greater the magnitude of tension force along the rope.

4 0
3 years ago
Fluid originally flows through atube at a rate of 200 cm3/s. Toillustrate the sensitivity of the Poiseuille flow rate to various
Alexxx [7]

Answer:

Q_{2}=1200cm^{3}/s

Explanation:

Given data

Q₁=200cm³/s

We know that:

F=n\frac{vA}{l}\\

can be written as:

ΔP=F/A=n×v/L

And

Q=ΔP/R

As

n₂=6.0n₁

So

Q=ΔP/R

Q=\frac{nv}{lR}\\ \frac{Q_{2}}{n_{2}}= \frac{Q_{1}}{n_{1}}\\ Q_{2}=\frac{Q_{1}}{n_{1}}*(n_{2})\\Q_{2}=\frac{200}{n_{1}}*6.0n_{1}\\ Q_{2}=1200cm^{3}/s

3 0
3 years ago
Other questions:
  • The atomic number, or ________ number, is the described as the number of _________ in the nucleus of an chemical element.
    8·1 answer
  • How much energy is needed to change 100 g of 0o C ice to 0o C water? The latent heat of fusion for water L=335,000 J/kg. Hint: T
    13·1 answer
  • (a) What is the potential between two points situated 10 cm and 20 cm from a 3.0-μC point charge? (b) To what location should th
    6·1 answer
  • Given that the acceleration of gravity at the surface of Mars is0.38 of what it is one Earth, and that Mars' radius is 3400 km,d
    8·1 answer
  • The relatively small, rocky bodies generally found orbiting between mars and jupiter are known as _____.
    13·2 answers
  • A horizontal 810-N merry-go-round of radius 1.60 m is started from rest by a constant horizontal force of 55 N applied tangentia
    8·1 answer
  • A snowboarder is sliding down a hill to the right. What are the 3 forces being used?
    15·1 answer
  • The mass and weight of box is 25 Kg and 245 N respectively when on Earth. What is the value of mass and weight of the box when i
    12·1 answer
  • Three materials, put them in order of what
    6·1 answer
  • When a light switch is turned on, the light comes on immediately because.
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!