If an object is NOT accelerating, then one knows for sure that it is ___.A. at rest
B. moving with a constant speed
C. slowing down
D. maintaining a constant velocity

Answers

Answer 1

Answer:
"Zero acceleration" means "velocity" that's not changing.

Sadly, it seems that both of these words are almost always
misinterpreted and misunderstood. "Acceleration" does NOT
mean "speeding up", and "velocity" does NOT mean speed.

"Velocity" is the speed AND direction of motion. So, for example,
'30 miles per hour north' and '30 miles per hour west' are the same
speed but different velocities.

"Acceleration" is ANY change in speed OR direction. Consider three
different families in three different cars. One car is speeding up, one is
slowing down, and the third is driving around a curve at a steady speed.
ALL three of the cars are accelerating.

Answer 2

Answer:

Answer:

Zero acceleration means velocity that's not changing.

Explanation:

Related Questions

A spacecraft is fueled using hydrazine (N2H4; molecular weight of 32 grams per mole [g/mol]) and carries 1640 kilograms [kg] of fuel. On a mission to orbit a planet, the fuel will first be warmed from −186 degrees Fahrenheit [°F] to 78 degrees Fahrenheit [°F] before being used after the long space flight to reach the planet. The specific heat capacity of hydrazine is 0.099 kilojoules per mole kelvin [kJ/(mol K)]. If there is 300 watts [W] of power available to heat the fuel, how long will the heating process take in units of hours [h]?
A golf club with 65J of kinetic energy strikes a stationary golf ball with a mass of 46g. The energy transfer is only 20% efficient. Calculate the initial speed of the golf ball
Which statement is true about the energy of electromagnetic radiation? A.the frequency of the emmited radiation is inversely proportional to its energy. B.the frequency of the emitted radiation is directly proportional to its energy C.the wavelength of the emitted radiation is directly proportional to its energy. D.the amplitude of the emitted radiation is inversely proportional to its energy.
Which type of energy transfer occurs when a beaker of water is heated on a hot plate?
Psychologists study animals because

You are given two solid materials one that is organic and one that is not organic. Describe three tests you could perform to help you decide which is which.

Answers

1- which one expires faster.
2- wbich one has more health benefits.
3- and which one tastes better which is the organic.

The NGC 3603 region of space is shown below. It is acloud of gas and dust. Stars are forming in this cloud,
How would NGC 3603 be classified?
O A. As a galaxy
O B. As a nebula
O C. As a planet
D. As a solar system

Answers

B. It would be classified as a nebula

Answer:

A. NGC 3603 would be classified as Nebula

Explanation:

Which statement best describes the superposition principle?A. If two in-phase waves arrive simultaneously at a point, their amplitudes add up.
B. If two out-of-phase waves arrive simultaneously at a point, their amplitudes add up.
C. If two in-phase waves arrive at a point one after another, their amplitudes add up.
D. If two out-of-phase waves arrive at a point one after the other, their amplitudes adds up

Answers

C. If two in-phase waves arrive at a point one after another, their amplitudes add up.

Final answer:

The superposition principle states that when two in-phase waves arrive simultaneously at a point, their amplitudes add up.

Explanation:

The correct statement that describes the superposition principle is option A: If two in-phase waves arrive simultaneously at a point, their amplitudes add up. In-phase waves have the same frequency, wavelength, and direction. When two in-phase waves meet, the amplitude of the resultant wave is the sum of the individual amplitudes.

Learn more about superposition principle here:

brainly.com/question/30780170

#SPJ12

A ball is projected horizontally from the top of a 92.0-meter high cliff with an initial speed of 19.8 m/s. Determine: (a) the horizontal displacement and (b) the final speed the instant prior to hitting the ground.

Answers

Answer:

Part a)

$d = 85.8 m$

Part b)

$v = 46.8 m/s$

Explanation:

Part a)

As we know that ball is projected horizontally

so here the vertical speed of the ball is zero

now we have

$y = (1)/(2)gt^2$

now we have

$92 = (1)/(2)(9.8)t^2$

$t = 4.33 s$

now in the same time the horizontal distance covered by the ball

$d = v_x t$

$d = 19.8 * 4.33$

$d = 85.8 m$

Part b)

now the horizontal speed of the ball always remains constant

so we have

$v_x = 19.8 m/s$

now in vertical direction we have

$v_y = v_0 + at$

$v_y = 0 + 9.8(4.33)$

$v_y = 42.4 m/s$

so the final speed of the ball is given as

$v = √(v_y^2 + v_x^2)$

$v = √(42.4^2 + 19.8^2)$

$v = 46.8 m/s$

The ball has two independent motions; the vertical motion and the horizontal motion.
That is the ball is falling vertically downwards from the cliff and the same time the ball is moving horizontally forward from the cliff.
Note: Initial Vertical Speed is = 0, Initial Horizontal Speed = 19.8 m/s
For the vertical motion: the initial velocity is zero. That is $u_(y)$ = 0.
S = ( $u_(y)$ )t + (1/2)gt^2. where g = acceleration due to gravity = 10 m/s^2
S = Vertical height = 92m
Substituting $u_(y)$ = 0, and S = 92m, g = 10m/s^2
92 = 0*t + (1/2)*10*t^2
92 = (1/2)*10*t^2
92 = 5t^2
5t^2 = 92
t^2 = 92/5
t^2 = 18.4 Take square root of both sides
t = $√(18.4)$
t = 4.29 seconds, that is the time to reach the ground. Time is same both for horizontal and vertical motion

a) Horizontal Displacement, which is Range R = Horizontal Speed * time
R = $u_(x)$ * time
R = 19.8 * 4.29 = 84.942 m.

b) Final Speed before hitting the ground.
Remember we realized that speed was in two parts: Vertical Speed and Horizontal Speed.
Just before hitting the ground Horizontal speed is same = 19.8 m/s, this is the same as the initial horizontal projected speed. (No acceleration in Horizontal direction so this remains the same)
Just before hitting the ground, $v_(y) = u_(y) + gt$
At projection Vertical speed is initially zero  $u_(y) = 0$
$v_(y) = 0 + 10*4.29$
Time is same both for horizontal and vertical motion
$v_(y)$ = 42.9 m/s
The velocity just before hitting the ground is 19.8 m/s in the horizontal direction and 42.9 m/s in the vertical direction.
These two are at right angles to each other. Therefore the resultant is:
= $\sqrt{19.8^(2)+ 42.9^(2) }$
= 47.25 m/s.
This is the resultant velocity just before it hits the ground.

Lin Yao looks at the back of a spoon. How should she describe her reflection?

Answers

The reflection of Lin Yao at the back of the spoon must be an upright reflection of himself. The back of the spoon is the convex side. When Lin Yao will look at the inner side of the spoon, his reflection will be inverted. This is because the inner side of the spoon is the concave side.

Answer:

It is A upside down and smaller

Explanation:

i just grabbed a spoon and look at myself

it also depends on what side you are looking at if you look at the back side it a normal mirror but if you look at the front its upside down and smaller

What happens as a result of an increase in the intensity of a sound wave? -the frequency of a soundwave increases. -the velocity of the sound wave decreases. -the energy of the soundwave increases. -the amplitude of the soundwave decreases