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natita [175]
3 years ago
8

Bodies A and B have equal mass. Body B is initially at rest. Body A collides with body B in a one–dimensional elastic collision.

Which statement is true?
Body A comes to rest.

The momentum of the system is not conserved.
The kinetic energy of the system is not conserved.
The final velocity of body B is twice the initial velocity of body A.
Physics
2 answers:
adell [148]3 years ago
8 0
Body A comes to the rest as this criteria can only conserve the momentum .. keep one thing in mind velocities get exchanged when there is a perfect elastic collision that to the masses have to be same
Luden [163]3 years ago
5 0

Answer:

Body A comes to rest.

Explanation:

If two objects collide and one of them was at rest and have the same mass, what will happen is that the one that was at rest will absorbe the kinetic energy of the system, and start moving with the same initial velocity of Body A.

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A mass on a horizontal surface is connected to the spring and pulled to the right along the surface stretching the spring by 25
solniwko [45]

Answer:

320 N/m

Explanation:

From Hooke's law, we deduce that

F=kx where F is applied force, k is spring constant and x is extension or compression of spring

Making k the subject of formula then

k=\frac {F}{x}

Conversion

1m equals to 100cm

Xm equals 25 cm

25/100=0.25 m

Substituting 80 N for F and 0.25m for x then

k=\frac {80}{0.25}=320N/m

Therefore, the spring constant is equal to 320 N/m

3 0
4 years ago
Which step should you take before you begin a scientific investigation? Print the directions after you complete the experiment.
agasfer [191]

Answer:

Clarify any confusing information in the instructions.

Purchase the equipment and chemicals you will need.

Explanation:

Steps of a scientific investigation include identifying a research question or problem, forming a hypothesis, gathering evidence, analyzing evidence, deciding whether the evidence supports the hypothesis, drawing conclusions, and communicating the results.

8 0
3 years ago
Read 2 more answers
Find the current if 55 C of charge pass a particular point in a circuit in 5 seconds.
uranmaximum [27]

Answer:

<em>The current is 11 Amperes</em>

Explanation:

<u>Electric Current</u>

The electric current is defined as a stream of charged particles that move through a conductive path.

The current intensity can be calculated as:

\displaystyle I=\frac{Q}{t}

Where:

Q = Electric charge

t   = Time taken by the charge to move through the conductor

The current intensity is often measured in Amperes.

The charge passing through a point in a circuit is Q= 55 c during t=5 seconds, thus the current intensity is:

\displaystyle I=\frac{55}{5}

I = 11 Amp

The current is 11 Amperes

4 0
3 years ago
Una tortuga recorre una pista de 1,25 km que tiempo emplearia si lleara una velocidad de 0,2 km/h
Marina86 [1]

Responder:

<h2>5 horas </h2>

Explicación:

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Dada la velocidad del coche = 0,25 km / hy la distancia = 1,25 km

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La sustitución de los valores dados en la fórmula dará;

Tiempo = 1,25 km / 0,25 km / h

Tiempo = 5 horas

Por lo tanto, la tortuga tardará 5 horas en viajar a una velocidad de 0,2 km / h.

7 0
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What is the speed of a bobsled whose distance-time graph indicates that it traveled 123m in 28s?
Irina18 [472]
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