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
Paul [167]
2 years ago
14

Calculate the work required to be done to stop a car of 1500 kg moving at a velocity of 60km/h​

Physics
1 answer:
natima [27]2 years ago
4 0

The work done to stop the car is -208.33 kJ

From work-kinetic energy principles, the change in kinetic energy of the car ,ΔK equals the work done to stop the car, W.

W = ΔK = 1/2m(v'² - v²) where

  • m = mass of car = 1500 kg,
  • v = initial velocity of car = 60 km/h = 60 × 1000 m/3600 s = 16.67 m/s and
  • v' = final velocity of car = 0 m/s (since the car stops).
<h3 /><h3>Calculating the work done</h3>

Substituting the values of the variables into the equation, we have

W = 1/2m(v'² - v²)

W = 1/2 × 1500 kg(v(0 m/s)² - (16.67 m/s)²)

W = 750 kg(0 (m/s)² - 277.78 (m/s)²)

W = 750 kg(- 277.78 (m/s)²)

W = -208333.33 J

W = -208.33333 kJ

W ≅ -208.33 kJ

So, the work done to stop the car is -208.33 kJ

Learn more about work done here:

brainly.com/question/9821607

You might be interested in
Read the scenario below and answer the question that follows. Susan was in her algebra class preparing to take a test. Her instr
Sati [7]

Answer:

reduced performance due to stereotype threat

Explanation:

3 0
3 years ago
When a potential difference of 13 V is placed across a resistor, the current in the resistor is 1.4
vitfil [10]
Just divide the two numbers with each other.
I mean 13/1.4=9.2857...
8 0
3 years ago
If an object undergoes a change in momentum of 10 kg m/s in 3 s ,then the force acting on it is
Paha777 [63]

Answer:

Force = 3.333 Newton

Explanation:

Given the following data;

Change in momentum = 10 Kgm/s

Time = 3 seconds

To find the force acting on it;

In Physics, the change in momentum of a physical object is equal to the impulse experienced by the physical object.

Mathematically, it is given by the formula;

Force * time = mass * change in velocity

Impulse = force * time

Substituting into the formula, we have;

10 = force * 3

Force = 10/3

Force = 3.333 Newton

8 0
3 years ago
a wire of a certain material has resistance r and diameter d a second wire of the same material and length is found to have resi
777dan777 [17]

Answer:

<h2>d₂ = 3d</h2><h2>The diameter of the second wire is 3 times that of the initial wire.</h2>

Explanation:

Using the formula for calculating the resistivity of an object to find the diameter.

Resistivity P = RA/L

R is the resistance of the material

A is the cross sectional area

L is the length of the material

Since A = πd²/4

P = R( πd²/4)/L

P = Rπd²/4L ... 1

If the second wire of the same material and length is found to have resistance R/9, the resistivity of the second material will be;

P₂ = (R/9)A₂/L₂

P₂ = (R/9)(πd₂²/4)/L₂

P₂ = (Rπd₂²/36)/L₂

P₂ = (Rπd₂²)/36L₂

Since the length and resistivity are the same;

P = P₂  and L =L₂

Equating 1 and 2;

Rπd²/4L =  (Rπd₂²)/36L₂

Rπd²/4L =  (Rπd₂²)/36L

d² = d₂²/9

d₂² = 9d²

Taking the square root of both sides;

√d₂² = √9d²

d₂ = 3d

Therefore the diameter of the second wire is 3 times that of the initial wire

5 0
3 years ago
Calculate the number of images formed by two plane mirrors inclined at angel of 18 to each other
allochka39001 [22]

Answer:

please give me brainlist and follow

Explanation:

Formula for number of images formed by two plane mirrors incident at an angle θ is n = 360∘θ. If n is even, the number of images is n-1, if n is an odd number of images.

4 0
3 years ago
Other questions:
  • A roofer drops a nail that hits the ground traveling at 26 m/s. How fast was the nail traveling 1 second before it hits the grou
    15·1 answer
  • 3. You are to determine the power rating of the motor in an elevator system. The elevator (with a full load) weights 1700 kg and
    11·1 answer
  • A machine has a mechanical advantage of 4.5. What force is put out by the machine if the force applied to the machine is 800 N?
    6·1 answer
  • Gravity anything with mass as gravity we know the earth has gravity because you and I are standing on earth and not floating off
    7·1 answer
  • How are mass and inertia related?
    5·1 answer
  • What property of an electromagnetic wave changes when the wave is encoded with analog information?
    9·1 answer
  • How can I show that the sphere of radius R performs a simple harmonic movement. how can i set its reference point and make the f
    10·1 answer
  • Name the types of motion represented by oA, AB and BC .​
    15·1 answer
  • 2 Magnetism comes from the word
    13·1 answer
  • Which vector below goes from (0, 0) to (-2, 3)?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!