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
Yakvenalex [24]
4 years ago
14

An object is moving initially with a velocity of 4.7 m/s . After 3.9 s the object's velocity is -2.1 m/s . What is the object's

average acceleration during this time?
I believe that the vf is -2.1 m/s vi should be 4.7 m/s and the t should be 3.9s but its wrong..? #confused
Physics
1 answer:
IgorC [24]4 years ago
8 0

Answer: The acceleration of the object is 0.67m/s^2 west.

Explanation: Here we are given the initial velocity and final velocity as well as the time taken. Acceleration is the change in velocity per unit time, thus the equation becomes.

a=dv/t

a=vf-vi/t

a=-2.1-4.7/3.9

a= 0.66m/s^2 west

You might be interested in
please help! easy science! second pic is the question and possible answers (A B C or D) its one question! brainliest promised!
kirza4 [7]

Answer:

Please do not take my word for this at all, but this is what I found, "When the pendulum swings back down, the potential energy is converted back into kinetic energy. At all times, the sum of potential and kinetic energy is constant." So I think the answer is B also you are anime fan too lol :DD I love hinata

Explanation:

4 0
3 years ago
When two or more different capacitors are connected in series across a potential source, which of the following statement must b
vova2212 [387]

Answer:

C. Each capacitor carries the same amount of charge.

Explanation:

When two or more different capacitors are connected in series across a potential source, each capacitor carries the same amount of charge.

In a series connected capacitor, sane amount of charge flows through the capacitors while different potential difference is passed across them.

The capacitors have the same charge as the charge flowing out directly from the potential source called emf since the emf is the driving force of charge in a circuit.

6 0
3 years ago
A tornado warning means that the current weather conditions could produce a tornado. True or False
WARRIOR [948]

true because it means that the cloud formation of a tornado has been already spotted.

4 0
3 years ago
Read 2 more answers
And metamorphic rock is classified according to its
ICE Princess25 [194]
The answer is basis of texture
8 0
4 years ago
Read 2 more answers
A constant friction force of 25 N acts on a 65-kg skier for 15 s on level snow. What is the skier’s change in velocity
nikdorinn [45]

Answer:

\Delta v=5.77m/s

Explanation:

Newton's 2nd Law relates the net force <em>F</em> on an object of mass <em>m </em>with the acceleration <em>a</em> it experiments by <em>F=ma.</em> In our case the net force is the friction force, since it's the only one the skier is experimenting horizontally and the vertical ones cancel out since he's not moving in that direction. Our acceleration then will be:

a=\frac{F}{m}

Also, acceleration is defined by the change of velocity \Delta v in a given time t, so we have:

a=\frac{\Delta v}{t}

Since we want the change in velocity, <em>mixing both equations</em> we conclude that:

\Delta v=at=\frac{Ft}{m}

Which for our values means:

\Delta v=\frac{Ft}{m}=\frac{(25N)(15s)}{(65Kg)}=5.77m/s

4 0
4 years ago
Other questions:
  • How are steam powered boats different from sailboats
    15·2 answers
  • Find the magnitude of the resultant forces 6N and 8N inclined at an angle 240° to each<br>other.​
    15·1 answer
  • Linear Motion is the most basic type of motion. true or false​
    7·1 answer
  • Why does atomic radius decrease from left to right?
    13·1 answer
  • Sound is heard louder in newly furnished room ,why?​
    7·2 answers
  • In a 4.0-kilometer race, a runner completes the first kilometer in 5.9 minutes, the second kilometer in 6.2 minutes, the third k
    9·1 answer
  • Ok so I am taking a test I need help please
    10·1 answer
  • How much work is done if a force of 20 N moves an object a distance of 6 m?​
    11·1 answer
  • If u humans were able to have powers what would it be any form make ur own creation of powers
    9·2 answers
  • 3<br><br><br> help with physics!!<br><br> ----------------<br><br> will give brainliest
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!