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
dolphi86 [110]
3 years ago
15

A car moving with an intial velocity of 60m/s is brought to rest in 30 seconds calculate the acceleration

Physics
1 answer:
gregori [183]3 years ago
6 0

Answer:

a = 2 [m/s^2]

Explanation:

To solve this problem we must use the expressions of kinematics, we must bear in mind that when a body is at rest its velocity is zero.

v_{f} = v_{i} - (a*t)

where:

Vf = final velocity = 0

Vi = initial velocity = 60 [m/s]

a = desacceleration [m/s^2]

t = time = 30 [s]

Note: the negative sign of the above equation means that the car is slowing down, i.e. its speed decreases.

0 = 60 - (a*30)

a = 2 [m/s^2]

You might be interested in
I lost 1 point on this and I don’t know what I did wrong.
Viktor [21]

Answer:

i think its because u gave the almost every answer the same exact thing. all the questions have different ways of moving which means different forces for each one i hope this helps :)

Explanation:

4 0
3 years ago
Read 2 more answers
_________ is an umbrella term that applies to location-aware technologies that allow devices to communicate securely with each o
ratelena [41]

Answer:Near-field communication

Explanation:

Near Field Communication is an umbrella term that applies to location-aware technologies that allow devices to communicate securely with each other over short distances. Near-field communication is a short-range wirelessconnectivity standard that uses magnetic field induction to enable communication between devices when they're touched together, or brought within a few centimeters to each other.It also specifies a way for the devices to establish a peer-to-peer network to exchange data. After the peer to peer network has been configured, another wireless communication technology, such as Bluetooth or Wi-Fi, can be used for longer-range communication or for transferring larger amounts of data.

3 0
3 years ago
Read 2 more answers
Which of the following takes place in the combustion chamber of a gas turbine engine?A. A glow plug is used to add enough heat t
erica [24]

Answer:

Fuel oil is mixed with a proper portion of compressed air

Explanation:

A gas turbine has three main part, which are

  • combustion chamber
  • air compressor
  • power turbine

The combustion chamber is responsible for mixing fuel with a proper portion of compressed air.

The air compressor supplies air in sufficient quantity to satisfy the requirements of the combustion chamber

The power turbine produces the power to drive the air compressor.

6 0
3 years ago
Which of the following places would u expect to have the warmest climate ?
adelina 88 [10]
B. Location#2 with an altitude of 200 feet
7 0
3 years ago
Consider a thin, spherical shell of radius 14.5 cm with a total charge of 29.5 µC distributed uniformly on its surface. (a) Find
ra1l [238]

Answer:

10.0     zero, by Gauss' Law the symmetrical distribution will produce no internal electric fields

21.5     E = k Q / R^2     behaves as if all charge were at center

E = 9 E9 * 29.5 E-6 / .215^2 = 5.74E6 N/C

8 0
3 years ago
Other questions:
  • Without an atmosphere, the equatorial curve would show minimum daily values on the solstices in June when the sub-solar point is
    12·1 answer
  • A car starts from rest and accelerates uniformly for a five seconds along a straight road. If speed obtained by the car is 72 km
    13·1 answer
  • Problem 1: Two sources emit waves that are coherent, in phase, and have wavelengths of 26.0 m. Do the waves interfere constructi
    15·1 answer
  • A block is pulled across a flat surface at a constant speed using a force of 50 newtons at an angle of 60 degrees above the hori
    13·1 answer
  • Glycerin is poured into an open U-shaped tube until the height in both sides is 20 cm. Ethyl alcohol is then poured into one arm
    14·1 answer
  • A series RL circuit contains two resistors and two inductors. The resistors are 33 Ω and 47 Ω. The inductors have inductive reac
    11·1 answer
  • . What type of stress is tension and at what type of plate boundary is it found?
    12·2 answers
  • Formula One racers speed up much more quickly than normal passenger vehicles, and they also can stop in a much shorter distance.
    11·1 answer
  • a force of 50 newtons pulls a rope attached to a 150 newton sled across a horizontal surface at a constant velocity of 5 meters
    14·1 answer
  • Acceleration of a free-falling object in a frictionless environment increases as a function of time.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!