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
aleksley [76]
2 years ago
10

At a race track, a car of mass 1150 kg crashes into a concrete wall at a speed of 85 m/s a. If the car comes to a stop when it h

its the wall, what the magnitude of the impulse applied to the car? The car crashed into the wall, stopping in 0.1 seconds. What force is applied to the car?
Physics
1 answer:
lukranit [14]2 years ago
5 0

Answer:

Explanation:

This is a momentum / impulse question.   Δp = F•(Δt)

The momentum of the car goes from 1150*85 = 97750 to 0 in 0.1 seconds.

From this we get the equation 97750 = F(.1)

 a)   F = 977500 N

For part b), the change in momentum is unchanged, so we must increase the time in order to decrease the force.

97750 = 200000(t)

b)       t = 0.49 s  or .5 s considering sig figs which means an increase factor of 5

You might be interested in
Help please i will mark brainlist!!
Dmitrij [34]
The answer is A.


p=m/v
p= 240/60
p= 4 g/cm^3
7 0
3 years ago
Read 2 more answers
Many of water's emergent properties, such as its cohesion, its high specific heat, and its high heat of vaporization, result fro
Bingel [31]

Answer:

Option 5.

Explanation:

Many of the properties of water like high specific heat, cohesion, high vaporization heat, etc can be contributed to the polar nature of water molecule.

Water being a polar molecule as it contains positively charged hydrogen and an electro-negative oxygen which results in uneven or non uniformity in sharing of electrons which leads to dipole formation and hence polarization of the molecule due to which it attracts its neighboring molecules.

This polar nature imparts the properties like cohesion, surface tension , adhesion, etc due to the presence of hydrogen bonds in water molecule.

3 0
3 years ago
Suppose you are standing at the exact center of a park surrounded by a circular road. An ambulance drives completely around this
vladimir2022 [97]

Answer: The pitch of the sound does not change.

Explanation: The pitch of sound wave is dependent on the frequency of the sound wave. The frequency of sound wave when their is a relative motion between an observer and a source is given by Doppler effect.

Doppler effect is a mathematical equation that gives the relationship between the observed frequency by an observer from any sound source and the relative motion between the observer and the source.

Mathematically,

f'= (v+v') /(v-vs) * f

Where f' = observed frequency of sound wave

v= speed of sound in air

v'= velocity of observer relative to sound source

vs= velocity of sound source relating to observer

f= frequency of sound produced by source

The observer is at the center, thus the distance between the observer and the source is constant (according to mensuration, the radius is constant for any given circle and since the car is moving along a circular path and the observer is at the center, thus the distance between them is constant), thus making the relative velocity between the observer and the source constant (vs=constant).

Also the frequency of sound wave produce by the source is a constant (f=constant)

The speed of sound in air is also a constant (v=336m/s)

The observer is standing at the center thus he is not moving, hence the relative motion between observer and source is also constant (v'=constant)

Since all parameters are constant, then the observed frequency will be constant too.



4 0
3 years ago
A biker pedals hard for 3 seconds. What is his initial velocity if he accelerated by 4m/s2 until he's going 20m/s. (Which equati
____ [38]

Answer:

answer is option 4

Explanation:

you have to use option 4 because u need to find out initial velocity (Vi)

4 0
2 years ago
Finderkeepers,ismadeormodel
ankoles [38]

Answer:

model lol

Explanation:

7 0
3 years ago
Other questions:
  • In the mixtures lab, you waited to see if the liquid would form lumpy or fluffy masses, which would indicate it was a _____.
    5·2 answers
  • Which of these shows magnesium and oxygen immediately before they join to form an ionic substance?
    12·2 answers
  • According to the octet rule, an atom with two electron shells is most stable when it contains eight
    8·1 answer
  • . 30
    6·1 answer
  • The shortest wavelengths occur in the:red end of the spectrumblue end of the spectrummiddle of the spectrum The light-gathering
    5·1 answer
  • A plate moves 200 m in 10,000 years. What is its rat in cm/year
    5·1 answer
  • 1. On one of the shelves in your physics lab is displayed an antique telescope. A sign underneath the instrument says that the t
    13·1 answer
  • What do simple machines accomplish
    12·2 answers
  • 5
    8·1 answer
  • A wave travels at 1,500 m/s with a frequency of 5 hertz. What is its wavelength?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!