3 years ago

A car moving 20 m/s accelerates to pass

Physics

1 answer:

babymother [125]3 years ago

8 0

The answer is 2m/s.
The equation is a=(vf-vi)/2

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Determine the apple's kinetic energy, KE, the gravitational potential energy of the system, gravity, and the total mechanical en

guajiro [1.7K]

Answer:

7.45

Explanation:

At 3.0 m PE = m*g*3.0, KE = m*g*(4.0 - 3.0)

At 2.0 m PE = m*g*2.0, KE = m*g*(4.0 - 2.0)

At 3.0 m PE = m*g*1.0, KE = m*g*(4.0 - 1.0)

At 0 m PE = 0, KE = m*g*h = total energy = 7.45 J

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3 years ago

A hockey puck has a momentum of 3.8 kg•m/s [E]. If its

agasfer [191]

Answer:

$1.6 \times 10 { }^{ - 1} kg \\$

Explanation:

I hope, it helped you.

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3 years ago

A girl moves quickly to the center of a spinning merry-go-round, traveling along the radius of the merry-go-round. Which of the

DochEvi [55]

Answer:

The angular speed of the system increases.

The moment of inertia of the system decreases.

Explanation:

As we know that the girl is going towards the center of the circle so here the moment of inertia of the girl is given as

$I = mr^2$

here we know that

r = position of the girl from the center of the disc

now we know that the girl is moving towards the center so its distance will continuously decreasing

So the moment of inertia of the girl will decrease

Now we know that that with respect to the center of the disc there is no torque on the disc + girl system

So here we can use angular momentum conservation

So we have

$I\omega = constant$

since moment of inertia is decreasing for the system

so angular speed will increase

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4 years ago

What is this Regeneration

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Answer:

Regeneration means that an organism regrows a lost part, so that the original function is restored.

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3 years ago

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The rate at which work is done or energy is used is referred to as what

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<span>The rate at which work is done or energy is used is referred to as power. </span>

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3 years ago