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
matrenka [14]
3 years ago
12

The initial speed of a body is 7.1 m/s. What is its speed after 2.23 s if it accelerates uniformly at 2.64 m/s 2 ? Answer in uni

ts of m/s. What is its speed after 2.23 s if it accelerates uniformly at −2.64 m/s 2 ? Answer in units of m/s
Physics
1 answer:
Nana76 [90]3 years ago
5 0

13.0m/s

1.2m/s

Explanation:

Given parameters:

Initial speed of the body = 7.1m/s

time taken = 2.23s

Acceleration = 2.64m/s²

Unknown:

Final speed = ?

Solution:

Acceleration is the rate of change of velocity with time.

   a = \frac{V - U}{T}

a  = acceleration

V = final speed

U = initial speed

T = time taken

  Input the variables and solve for V;

 

   2.64 = \frac{V - 7.1}{2.23}  

  V - 7.1 = 5.9                              expression 1

  V = 5.9 + 7.1 = 13.0m/s

B

Using the same parameters, the speed after a uniform deceleration of -2.64m/s², the negative sign implies deceleration;

 from expression 1;

           V - 7.1  = -5.9

           V = -5.9 + 7.1 = 1.2m/s

learn more:

Acceleration brainly.com/question/3820012

#learnwithBrainly

You might be interested in
Mr. Rudman drives his race car for 4 hrs at 150<br> miles/hr. How far will he travel?
Lilit [14]
150*4=600
So the answer is 600
7 0
2 years ago
What is the weight of a 225kg space probe on the moon and the acceleration of gravity on the moon is 1.62
olga nikolaevna [1]
<span>364N should be your answer.. hope this helps

</span>
7 0
2 years ago
Read 2 more answers
Which term refers to energy derived from heat inside the earth
tino4ka555 [31]
I think the answer is Geothermal energy. 
3 0
3 years ago
An 3.7 lb hammer head, traveling at 5.8 ft/s strikes a nail and is brought to a stop in 0.00068 s. The acceleration of gravity i
CaHeK987 [17]

Answer:

31677.2 lb

Explanation:

mass of hammer (m) = 3.7 lb

initial velocity (u) = 5.8 ft/s

final velocity (v) = 0

time (t) = 0.00068 s

acceleration due to gravity (g) 32 ft/s^{2}

force = m x ( a + g )

where

  • m is the mass = 3.7 lb
  • g is the acceleration due to gravity = 32 ft/s^{2}
  • a is the acceleration of the hammer

       from v = u + at

       a = (v-u)/ t

       a = (0-5.8)/0.00068 = -8529.4 ( the negative sign showa the its decelerating)

we can substitute all required values into force= m x (a+g)

force = 3.7 x (8529.4 + 32) = 31677.2 lb

       

4 0
2 years ago
What is meaning of convection​
crimeas [40]

Answer:

Convection is heat transfer through the movement of liquids and gases.

3 0
2 years ago
Other questions:
  • Ixchelt burns her tongue when she takes a sip of hot coffee from her mug. Which part of this example represents heat?
    6·2 answers
  • bailee bad a gross income of 2358.33 during each pay period in 2009. if she got paid monthly , how much of her oay was defucted
    5·1 answer
  • An atom is the most __________ unit of living and nonliving things.
    8·2 answers
  • Which two statements offer evidence that the clocks energy is conserved?
    11·2 answers
  • How do protons ever fuse together in the presence of the electromagnetic force? There is another force involved here called the
    9·1 answer
  • Four identical masses of 2.5 kg each are located at the corners of a square with 1.0-m sides. What is the net force on any one o
    7·1 answer
  • The single invention of the ______ has advanced what we know about the universe more than any other scientific technology. a. Su
    9·1 answer
  • Hey can someone please help me and can u show your work plz plz plz plz
    15·1 answer
  • 6. traction a. friction between a tire and the road.b. pushes a moving object out of a curve and into a straight linec. the abil
    15·1 answer
  • A ballon holds 24L at 45 k . find the volume if the temperature is increased to 911 k
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!