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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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C. The car from driving off the road on a curve

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A centripetal force actually causes circular motion. This occurs when an object moves in a circular path or a circle,a force will definitely act on it.

For instance, a car travelling in a circular path must definitely experience this force acting on it, even when the car moves at a constant speed. If it does not exist the object will definitely spin off in a direction tangential to the circular path or curve.

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A coin released at rest from the top of a tower hits the ground after falling 5.7 s. What is the speed of the coin as it hits th
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Given parameters:

Initial velocity of Coin = 0m/s

Time taken before coin hits ground  = 5.7s

Unknown:

Final velocity of the coin  = ?

Velocity is displacement with time. To solve this problem, we have to apply one of the equations of motion.

The fitting one of them here is shown below;

             V = U + gt

where;

V is the final velocity

U is the initial velocity

g is the acceleration due to gravity

t is the time taken

Here we use positive value of acceleration due to gravity because the coin is falling with the effect of acceleration and not against it.

Now input the parameters and solve;

               V  = 0 + 9.81 x 5.7

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Therefore, the final velocity is 55.917m/s.

8 0
3 years ago
For a standard production car, the highest road-tested acceleration ever reported occurred in 1993, when a Ford RS200 Evolution
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Answer:

a = 8.06 m/s²

Explanation:

The acceleration of this car can be found using the first equation of motion:

v_f = v_i + at\\\\a = \frac{v_f-v_i}{t}

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vi = initial speed = 0 m/s

t = time = 3.323 s

Therefore,

a = \frac{26.8\ m/s-0\ m/s}{3.323\ s}

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What kind of system does not allow matter or energy to enter or exit?
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a closed system does not allow matter or energy to pass through

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