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3 years ago

Which of the following is/are the best example(s) of elastic collision(s)? Explain why you chose your answer(s).

Physics

1 answer:

Marizza181 [45]3 years ago

8 0

Answer:

option A

Explanation:

In a completely elastic collision, the total kinetic energy is maintained and doesn't change.

Although in a very short time the kinetic energy transforms into potential energy and then again it changes to kinetic energy.

On the other hand, in any collision(elastic or inelastic) the total momentum remains fixed.

The elastic collision from the given option is collision between two billiard balls.

hence, the correct answer is option A

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A 10.0 kg weather rocket generates a thrust of 230 NN . The rocket, pointing upward, is clamped to the top of a vertical spring.

blondinia [14]

Answer: 0.2m

Explanation: Firstly only the Rocket's Weight Compress the spring which can be found by

$F_r=M_r*g\\F_r=10*9.81\\F_r=98.1N$

According to Hooks Law

$F_r=k*x\\x=F_r/k\\x=98.1/480\\x=0.2m$

The part b and c of this question is done in the attachment

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3 years ago

What determines an object’s thermal energy

Tems11 [23]

Answer:

temperature and mass

Explanation:

The higher the temperature of a given quantity of a substance, more is its thermal energy.

If a substance contains more mass, this also implies that the object has more particles in it . hence, it has high thermal energy.

Additional Information :

Temperature is a measure of the average kinetic energy of the particles of a substance.

The thermal energy of an object depends on three factors:

number of molecules in the object
temperature of the object.
thermal energy it has.

3 0

2 years ago

A force of 500 N is exerted on a baseball by the bat for 0.001 s. What is the change in momentum of the baseball?

GarryVolchara [31]

Answer: Δp = F*Δt = 500N*0.001s = 0.5Ns

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3 years ago

Which has more gravitaatoinal potental energy: a bird on the ground or the same bird in the tree? why?

julsineya [31]

The same bird on the tree has more gravitational potential energy. This is because it is at a higher distance from the ground as it is on the tree, than when it is on the ground.

Considering also the formula for Gravitational Potential Energy GPE = mgh

For the bird on the ground, h =0, therefore GPE = m*9.8*0 = 0

For that on the tree = mgh = m*9.8*h

Of course the one on the tree has a value greater than zero.

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3 years ago

81. A 560-g squirrel with a surface area of 930cm2 falls from a 5.0-m tree to the ground. Estimate its terminal velocity. (Use a

Irina18 [472]

Answer:

Explanation:

Given

mass of squirrel $m=560 gm$