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
katrin2010 [14]
2 years ago
12

During a trial run, race car A starts from rest and accelerates uniformly along a straight level track for a particular interval

of time. Race car B also starts from rest and accelerates at the same rate, but for twice the time. At the end of their respective acceleration periods, which of the following statements is true? Car A has traveled a greater distance. Car B has traveled twice as far as A. Car B has traveled four times as far as car A. Both cars have traveled the same distance
Physics
1 answer:
kondor19780726 [428]2 years ago
5 0
Answer: car B has travelled 4times as far as Car A

d=vi*t+1/2at^2

No initial velocity so equation becomes;

d=1/2at^2 and the acceleration is the same between both only time is different;

Car A d=1/2a(1)^2

Car B d=1/2a(2)^2

Car A d= 1^2=1

Car B d= 2^2=4

Car B d=4*Car A

So car B has travelled 4 times as far as car A
You might be interested in
Plants are made of_________________cells, which have membrain-bound_____.
Readme [11.4K]
Plant cells are eukaryotic cells that differ in several key aspects from the cells of other eukaryotic organisms. number two sry but Idk
 :(
4 0
3 years ago
Assume that a vaulter is able to carry a vaulting pole while running as fast
rewona [7]
A,walls
Speleleelelelekeke
8 0
3 years ago
Read 2 more answers
. A spring has a length of 0.200 m when a 0.300-kg mass hangs from it, and a length of 0.750 m when a 1.95-kg mass hangs from it
kap26 [50]

Answer:

29.4 N/m

0.1  

Explanation:

a) From the restoring Force we know that :  

F_r = —k*x  

the gravitational force :  

F_g=mg  

Where:

F_r is the restoring force .

F_g is the gravitational force

g is the acceleration of gravity

k is the constant force  

xi , x2 are the displacement made by the two masses.

Givens:

<em>m1 = 1.29 kg</em>

<em>m2 = 0.3 kg  </em>

<em>x1   = -0.75 m  </em>

<em>x2 = -0.2 m </em>

<em>g   = 9.8 m/s^2  </em>

Plugging known information to get :

F_r =F_g

-k*x1 + k*x2=m1*g-m2*g

k=29.4 N/m

b) To get the unloaded length 1:  

l=x1-(F_1/k)

Givens:

m1 = 1.95kg , x1 = —0.75m  

Plugging known infromation to get :

l= x1 — (F_1/k)  

= 0.1  

 

3 0
3 years ago
The spin-drier of a washing machine revolving at 900.RPM slows down uniformly to 300.RPM while making 60. revolutions. Find the
jeyben [28]
<h2>Answer:</h2>

<u>Acceleration is </u><u>-10.57 rad/s²  </u>

<u>Time is </u><u>6 seconds</u>

<h2>Explanation:</h2><h3>a) </h3>

u=900rpm= 94.248 rad/s  

v =300rpm= 31.416 rad/s  

s=60 revolutions= 377 rad  

v²= u²+ 2as  

31.416² = 94.248²+ 2 * a * 377  

a = v²-u² / 2s

a= -10.57 rad/s²  

<h3>b) </h3>

Using 1st equation of motion

v-u/a = t

Putting the values

t = (31.4 - 94.2)/-10.57

t = 6 seconds

3 0
2 years ago
How is the frictional force produced?​
andrew-mc [135]

Answer:

frictonal force due to the surface of irregularities

5 0
3 years ago
Other questions:
  • If the pressure of a gas sample is quadrupled and the absolute temperature is doubled. True or False
    12·1 answer
  • A train is approaching a signal tower at a speed of 40m/s. The train engineer sounds the 1000-Hz whistle, while a switchman in t
    11·1 answer
  • An electron is confined to a linear region with a length of the same order as the diameter of an atom (about 100 pm). Calculate
    13·1 answer
  • A hollow sphere of negligible mass and radius R is completely filled with a liquid so that its density is rho. You now enlarge t
    13·1 answer
  • Ele is playing with a ball in a bus that moves in a straight line with constant velocity What can you say about the motion of th
    10·1 answer
  • An object of mass 2 kg starts from rest and is allowed to slide down a
    10·1 answer
  • What is the mass of a vehicle that has 50,000 N and 25M/S/S
    9·1 answer
  • What is meant by fundamental unit? write any two difference between mass and weight.​
    14·1 answer
  • What is the speed of a car that travels 50m in 25min? *
    15·2 answers
  • After using soap to wash dishes by hand, if is sometimes difficult to keep your hands from remaining stick. Explain why rinshing
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!