A pencil is dropped from the roof of the school what is the speed after 3s down is the negative direction.I'm confused on what equation to use

Answers

Answer 1

Answer: On Earth, the acceleration due to gravity is (-9.8 meters per second) per second.

If the school, the roof, and the pencil are on Earth,
then after 3 seconds, the pencil's speed is

[ (-9.8 meters per second)/second ] times [ 3seconds ] = -29.4 meters per second

Answer 2

Answer: you have to use 1st equation of motion v = u +at as distance(s) is not given.....
as pencil is dropped from rest therefore u = 0m/s and accleration due to gravity is = -9.8 m/s
v = 0 - (9.8)(3)
v = -29.4 m/s

Related Questions

which phenomenon is most directly responsible for earth’s magnetic field? Earth spinning on its axis. The moon's gravitational pull on earth? Earth's revolution around the sun? The moon's revolution around earth?
The milliliter is a meter unit for
Which of these is true about inherited traits? A. All traits are inherited from only one parent. B. Every trait is controlled by only one gene. C. Traits always follow simple patterns of inheritance. D. Traits may be determined by multiple genes.
The magnitude of the gravitational field on the surface of a particular planet is 2g. The planet’s mass is half the mass of the Earth. What is the planet’s radius in terms of the radius Rg of Earth?
As the mass oscillates on a spring, when is displacement at its maximum and velocity equal to zero? A. when it is partially compressed B. when it is at the equilibrium position C. when it is fully stretched D. when it is at near rest

Which was not a cause of the Spanish-American War in 1898?A.
the sinking of the Maine

B.
Spanish cruelties in Cuba

C.
yellow journalism

D.
President McKinley's desire for war

Answers

(d) President McKinley did not want war.

D, President McKinley's desire for war.

Watching television, with theremote control in your hand, which of the following exerts the greatest gravitational force on you? A) The couch you are sitting on

B) The TV actors tne room

C) The moon

D) The remote control in your hand

Answers

A. The couch you are sitting on

Final answer:

The gravitational force an object exerts is influenced by its mass and distance. From the options, the moon exerts the most gravitational force because of its significant mass, despite being far away.

Explanation:

The factor that determines the gravitational force exerted by an object is both its mass and the distance from it. The equation for gravitational force is F = G * (m1 * m2) / r^2, where 'G' is the gravitational constant, 'm1' and 'm2' are the masses of the two objects, and 'r' is the distance between their centers.

In the options given: the remote control, the couch, TV actors, and the moon, despite the latter being far off, still, the moon exerts the strongest gravitational force on you. The magnitude of gravitational force exerted by the moon is larger due to its massive size compared to the rest, even though it's far away. The effect is noticeable in the ebb and flow of ocean tides caused by the moon's gravity.

Learn more about Gravitational Force here:

brainly.com/question/32609171

#SPJ3

Which statement best describes beaches?A.) Beaches are always changing due to factors such as waves adding and eroding sand.

B.) Beaches change little over time as waves follow the same patterns year after year.

C.) Beaches change little over time as wind patterns stay the same.

D.) Beaches change little over time as waves move further up the shore.

Answers

I would say A. Beaches are always changing due to factors such as waves adding and eroding sand

A is a good example, i suppose.

Label the three forms of energy represented in this image

Answers

Answer:

Where is this image?

The image is not showing up.

Why is weight measured in newtons

Answers

Because weight is a force, and the SI unit of force is the Newton.

When you are in bed asleep, are you in motion? Explain

Answers

Typically when you fall asleep your brain puts your body into a temporary state of paralysis. This does not always affect you fully however, which is where people sleep walk and other such things like that. Similarly, your brain does not always wake up all at once, which is why it is possible to wake up and not be able to move for awhile.

Yes, you are moving, your chest moves up and down while you are breathing. The only time you would truly be devoid of motion is when you are deceased.

Other Questions

Explain the scientific meaning of the word random

2. How can iron fillings provide evidence that can be used to explain how two magnets exert forces on each other even though the magnets are not in contact with each other?

a graph is named mpg vs speed of a car traveling on a straight flat road. what does that name tell us about the graph

If a car can go from 0 to 60 mi/hr in 8.0 seconds, what would be its final speed after 5.0 seconds if its starting speed were 50 mi/hr?