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Did you guys know that saying ''Reeeee" is disrespectful and offensive? Ill explain: Because “Reeee” is used to mock people on t

zmey [24]

Answer:

here are no results for Did you guys know that saying ''Reeeee" is disrespectful and offensive? Ill explain: Because “Reeee” is used to mock people on the autism spectrum, supposedly mimicking a noise that someone on the spectrum might make

Explanation:

3 0

3 years ago

Read 2 more answers

An object will begin moving from rest when acted upon by which forces?

denis23 [38]

Answer:

C. The gravity acceleration is in the same direction as the force of gravity, and thus toward the center of the earth.

Explanation:

[ More info.- It doesn't affect the body when it is at the rest, and when it is in motion, it acts toward the center of the Earth and it's component is known as "Centripetal force" ]

UwU

3 0

2 years ago

The effect of mechanical work on an object is _. (complete the sentence.)

Advocard [28]

Answer:

Displacement (i.e. change in its final position)

Explanation:

In classical mechanics work is described as the displacement of the body in the direction of the applied force.

<u>Mathematically given as:</u>

$W=F.s\ cos\ \theta$

where:

F = force on the body

s = displacement of the body

θ = angle between the force and direction of displacement

While force, acceleration, velocity can also be the answer for the blank space but the displacement effect is visible during and even after the work has been done, so one can notice the change in position of the object even when the person has not seen the process but just the initial condition of the body.

8 0

3 years ago

Spaceship flies past mars with a speed of 0.985c rela- tive to the surface of the planet. when the spaceship is directly overhea

galben [10]

The proper time would be the time measured in the rest frame of the event, so in this case the observer on mars would measure the proper time.

8 0

3 years ago

An object is released from rest near a planet’s surface. A graph of the acceleration as a function of time for the object is sho

Natasha_Volkova [10]

Answer:

the body has descended a height (4a)

Explanation:

This exercise should use the acceleration given in the graph, but unfortunately the graph is not loaded, but we can build it, using the law of universal gravitation and the fact that you indicate that the movement is near the surface of the planet

F = m a

f

orce is gravitational force

G M m / r² = m a

a = G M / r²

where G is the universal constant of gravitation, M the mass planet and r the distance from the center of the planet of radius R to the body, if we measure the height of the body from the surface of the planet (y), we can write

r = R + y

for which

a = G M/R² (1+ y/R)⁻²

if we use y«R we can expand the function in series

a = (G M /R²) (1 -2 y/R - 2 (-2-1) /2! y² / R² +…)

as the height is small we can neglect the quadratic term and in many cases even the linear term, for this exercise we will remain only constant therefore the acceleration is constant

a = G M / R²

from this moment we can use the relations of motion with constant acceleration for the exercise

a) they ask us for the position for t = 2s

y = y₀ + v₀ t - a t²

as the body is released v₀ = 0

y-y₀ = - a t²

y-y₀ = - a 2²

y-y₀ = - a 4

therefore

therefore the body has descended a height (4a) where a is the acceleration of the planet's gravity

5 0

3 years ago