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
7

A car with a mass of 1,324 kilograms, traveling at a speed of 20 meters/second, crashes into a wall and stops. What is the kinet

ic energy after this perfectly inelastic collision?
A. 0.0 joules
B. 3.2 × 103 joules
C. 1.0 × 104 joules
D. 1.3 × 104 joules ...?
Physics
2 answers:
Valentin [98]4 years ago
7 0
I think the correct answer from the choices listed above is option A. The kinetic energy after the perfectly inelastic collision would be zero Joules. <span>A </span>perfectly inelastic collision<span> occurs when the maximum amount of kinetic energy of a system is lost. Hope this answers the question.</span>
Ksenya-84 [330]4 years ago
5 0

Answer:

A. 0.0 joules

Explanation:

We can calculate the initial kinetic energy of the car, which is given by:

K=\frac{1}{2}mv^2 = \frac{1}{2}(1,324 kg)(20 m/s)^2=2.65\cdot 10^5 J

where m is the mass of the car and v its initial speed. After the collision, the car stops, so its final speed is zero. Therefore, the new kinetic energy of the car will be

K=\frac{1}{2}(1,324 kg)(0 m/s)^2 = 0 J

This type of collision is called 'perfectly inelastic collision', and it occurs when there is the maximum loss of kinetic energy, as in this case. Therefore, the correct answer is

A. 0.0 joules

You might be interested in
A ray diagram is shown.
Rufina [12.5K]

Answer:

X

Explanation:

8 0
3 years ago
Read 2 more answers
A homeowner is trying to move a stubborn rock from his yard. By using a a metal rod as a lever arm and a fulcrum (or pivot point
pogonyaev

Answer:

L = 1.545 m

Explanation:

Let the total length of the rod is L

now the torque must applied on the other end of the rod so that it will balance the torque due to weight of rock on other side of fulcrum

so we will have

mg \times d = F(L - d)

so we have

325\times 9.8 \times 0.266 = F(L - 0.266)

F = 663 N

848 = 663(L - 0.266)

L = 1.545 m

6 0
3 years ago
When a certain string is clamped at both ends, the lowest four resonant frequencies are 50, 100, 150, and 200 Hz. When the strin
mario62 [17]

Answer:

Explanation:

Given

Lowest four resonance frequencies are given with magnitude

50,100,150 and 200 Hz

The frequency of vibrating string is given by

f=\frac{n}{2L}\sqrt{\frac{T}{\mu }}

where n=1,2,3 or ...n

L=Length of string

T=Tension

\mu =Mass per unit length

When string is clamped at mid-point

Effecting length becomes L'=0.5 L

Thus new Frequency becomes

f' =\frac{n}{L}\sqrt{\frac{T}{\mu }}

i.e. New frequency is double of old

so new lowest four resonant frequencies are 100,200,300 and 400 Hz      

4 0
3 years ago
A 2.50 kg ball moving at 7.50 m/s is caught by a 70.0 kg man while the man is standing on ice. What is the common velocity of th
yarga [219]

Answer:

V = 2.5*7.0 / ( 2.5 + 70 )

8 0
2 years ago
What cities (more than 1) has many fronts
Arisa [49]
Chattanooga - Chatype, London - Johnston, Berlin - BMF Change, Milan - Milano City, Eindhoven - Eindhoven, Stockholm - Stockholm Type, Minneapolis, and St. Paul - Twin. 
6 0
3 years ago
Other questions:
  • A book 15.6 cm tall is 28.7 cm to the left of a plane mirror. What is the height of the image formed?
    8·1 answer
  • How can friction help you in your daily life?
    15·2 answers
  • Match the term to the RIGHT definition
    5·2 answers
  • Does the sun fuse hydrogen into helium or vice versa?
    6·1 answer
  • Silvia is driving at the speed limit of 25 m/s when she sees an ambulance approaching in her rear view mirror to the move out of
    14·1 answer
  • 6. A proton is released from rest 1.0 cm off a center of a uniformly charged disk of a 2.0 m radius carrying a +180 nC charge. W
    7·1 answer
  • Can someone please provide a step by step explanation to the question in the image? It is really important for me to understand
    7·1 answer
  • Consider the hypothetical observation "a planet beyond Saturn rises in west, sets in east." This observation is not consistent w
    9·1 answer
  • Which element has an isotope with 43 neutrons and a mass number of 76?
    14·1 answer
  • If My mom is 40 and my goldfish died what is my favorite color ?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!