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
sergij07 [2.7K]
3 years ago
8

Objects A and B each have a mass of 25 kilograms. Object A has a velocity of 5.98 meters/second. Object B is stationary. They un

dergo a perfectly elastic collision in one dimension. What is the total kinetic energy of the system after the collision?
A.)1.2 x 10^2 J
B.)4.5 × 10^2 joules
C. 5.0 × 10^2 joules
D. 9.5 × 10^2 joules
E. 1.1 × 10^3 joules
Physics
2 answers:
Vinil7 [7]3 years ago
6 0
There are numerous information's already given in the question. Based on those information's, the answer can be easily deduced.

Mass of the objects = 25 kg
Velocity of object A = 5.98 m/s
Velocity of object B = 0 m/s
Total kinetic energy = (1/2) * mass * (velocity)^2
                                = 0.5 * 25 * (5.98)^2
                                = 4.5 * 10^2 joules.
From the above deduction, we can conclude that the correct option among all the options that are given is option "B".
Genrish500 [490]3 years ago
4 0
<h3><u>Answer;</u></h3>

  = 4.5 * 10^2 joules.

<h3><u>Explanation;</u></h3>
  • A perfectly elastic collision is a type of collision in which kinetic energy is conserved.
  • Therefore, to calculate the kinetic energy of the system after the collision we use the formula 1/2 mv²

Mass = 25 kg

Velocity = 5.98 m/s

KE = 1/2 × 25 × 5.98 ²

     = 447 Joules

This translates to about <em><u>4.5 ×10^2 Joules</u></em>

You might be interested in
A bird sits on a high-voltage power line with its feet 3.87 cm apart. The wire is made from aluminum, is 2.11 cm in diameter, an
Svetlanka [38]

Answer:

ΔV=0.484mV

Explanation:

The potential difference across the end of conductor that obeys Ohms law:

ΔV=IR

Where I is current

R is resistance

The resistance of a cylindrical conductor is related to its resistivity p,Length L and cross section area A

R=(pL)/A

Given data

Length L=3.87 cm =0.0387m

Diameter d=2.11 cm =0.0211 m

Current I=165 A

Resistivity of aluminum p=2.65×10⁻⁸ ohms

So

ΔV=IR

=I(\frac{pL}{A})\\ =I(\frac{pL}{\pi r^{2} } )\\=I(\frac{pL}{\pi (d/2)^{2} } )\\=165A((\frac{(2.65*10^{-8})(0.0387m)}{\pi (0.0211m/2)^{2} } ))\\=4.84*10^{-4}V

ΔV=0.484mV  

3 0
3 years ago
A box of weight 74 N is sliding on a horizontal surface at a constant velocity due to an external force F-&gt; of magnitude 4.8
n200080 [17]

Answer

4.8 N

If the box is moving with a constant velocity, then we can say that the system is in equilibrium. This is because if the external force (F->) was greater than other forces the box would be accelerating. This tells us that this force (F->) is just enough to overcome friction and so it must be equal to 4.8 N.

The normal force has no effect to the horizontal velocities or forces. It is equal to -Weight. That is -74 N. The negative sign shows that the force is in opposite direction.

6 0
3 years ago
At what speed, as a fraction of c , is a particle's total energy twice its rest energy
WINSTONCH [101]
The rest energy of a particle is
E_0=m_0 c^2
where m_0 is the rest mass of the particle and c is the speed of light.

The total energy of a relativistic particle is
E=mc^2 =  \frac{m_0 c^2}{ \sqrt{1- \frac{v^2}{c^2} } }
where v is the speed of the particle.

We want the total energy of the particle to be twice its rest energy, so that
E=2E_0
which means:
\frac{m_0c^2}{ \sqrt{1- \frac{v^2}{c^2} } }=2m_0 c^2
\frac{1}{ \sqrt{1- \frac{v^2}{c^2} } }=2
From which we find the ratio between the speed of the particle v and the speed of light c:
\frac{v}{c}=  \sqrt{1- (\frac{1}{2})^2 }  =0.87
So, the particle should travel at 0.87c in order to have its total energy equal to twice its rest energy.
3 0
3 years ago
At what speed does a 1400 compact car have the same kinetic energy as a 20000 truck going 25 ?
kumpel [21]
K=1400*V^2/2
K=20000*25^2/2. => 1400*V^2/2=20000*25^2/2 <=> 1400*V^2=20000*25^2
14*V^2=200*225
v^2=100*225/7
v=250/7^(1/2)

Answer: 250*7^(1/2)/7
4 0
3 years ago
How to find the total displacement of an object ?
OLga [1]

Answer:

it can be calculated by measuring the final distance away from a point, and then subtracting the initial distance

8 0
3 years ago
Other questions:
  • Since the aluminum bar is not an isolated system, the second law of thermodynamics cannot be applied to the bar alone. Rather, i
    8·1 answer
  • Compared to the earth would the sun appear to move more quickly across Mercury’s sky or more slowly? Why?
    13·1 answer
  • What is the part of the cell that controls all the other parts?
    6·1 answer
  • What is the magnitude of the force a charge 25uc exerts on a charge 3mc 35 cm away?
    13·1 answer
  • A 10.0-g bullet is fired into a stationary block of wood having mass 5.00 kg. The bullet embeds 10 pts into the block and the sp
    6·1 answer
  • 4. Anaerobic exercise helps type 2 diabetes.<br> a. True<br> b. False
    5·1 answer
  • How are frequency and were peroid related?
    6·1 answer
  • Baggage on the floor of the baggage car of a high-speed train is not prevented from moving other than by friction. The train is
    13·1 answer
  • Why do you think fixed boundaries ""flip"" waves and loose boundaries do not?
    9·1 answer
  • Plsss help me i need the answers
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!