Ask question

Ask question

All categories

3 years ago

13

A 3kg book falls from a shelf. If it lands with a speed of 4.8 m/s, from what height did it fall? A. 28.8 m , B. 1.2 m , C. 0.6

m , D. 14.1 m

1 answer:

Irina-Kira [14]3 years ago

7 0

The correct answer is B. 1.2 m (apex)

You might be interested in

Which process produces rising air when mountains push the air upward?

kicyunya [14]

Answer;

A. orographic lifting

Explanation;

Orographic lifting is a process that takes place when an air mass is forced from a low elevation to a higher elevation as it moves over rising terrain.

This can be explained by; When air is blocked by mountains, it cannot go through these mountains, As it ascends or moves up the mountain, the air then cools as it rises and when it cools to its saturation point, the water vapor condenses and cloud forms.

These clouds formed are known as orographic clouds, that develop in response to the lifting forced by the topography the earth.

5 0

3 years ago

Read 2 more answers

In a roller coaster, a car has X joules of potential energy when it is resting at the top of the hill. The car moves downhill an

natita [175]

"At the bottom, the car has X joules of mechanical energy" is the one among the following choices given in the question that <span>the law of conservation of energy predict about the car. The correct option among all the options that are given in the question is the second option or option "B". I hope the answer helped you.</span>

4 0

3 years ago

A symbolic model for learning is a model that is observed in person.

kap26 [50]

Answer:

True

Explanation:

3 0

3 years ago

Read 2 more answers

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

3 0

4 years ago

Which is a correct example of the principle of conservation of momentum? A) reversing of a car at a dead end B) conversion of ra

Hunter-Best [27]

I think the answer would be D.

3 0

3 years ago

Read 2 more answers