Graphing Motion

The pattern of weather in an area overtime is called

zzz [600]

The pattern of the temperature in a region day by day is called weather. The year by year temperature is a called climate.

6 0

3 years ago

Which statement best describes the relationship between atoms and nuclear forces?

Katarina [22]

<span>Strong nuclear forces hold the nucleus of an atom together. Weak nuclear forces are involved when certain types of atoms break down.</span>

3 0

3 years ago

What is the problem with using your boat's engine to drive it onto a trailer?

Elenna [48]

Silt and other wash can accumulate behind the motor and if other boats are added they can get their hulls damaged or scraped then, depending on the size of the material. It can also cause trailers to get stuck if they drive into the place from where the boat came.

3 0

3 years ago

Why is the answer B for this question? I know acceleration should be negative down but I don't know the other two variables.

AnnZ [28]

Answer:

B

Explanation:

Displacement, velocity, and acceleration are vectors: they have magnitude and direction.

The convention is that "down" is negative and "up" is positive.

Thus, if an object is higher than when it started, its displacement is positive. If it is lower, the displacement is negative.

If it is still going "up", its velocity is positive. If it is falling, its velocity is negative.

1. Displacement

The formula for vertical displacement is

Δy = v₀t - ½gt²

If v₀ = 30 m/s, t = 2 s, and g = 9.8 m·s⁻², then

$\begin{array}{rcl}\Delta y & = & 30 \times2 - \dfrac{1}{2}\times 9.8 \times2^{2}\\& = & 60 - 4.9 \times 4\\& = & 60 - 19.6\\& = & \mathbf{40.4}\\\end{array}\\\text{The displacement is}\textbf{ up}}$

2. Velocity

The formula for vertical velocity is

v = v₀ - gt

If v₀ = 30 m/s, t = 2 s, and g = 9.8 m·s⁻², then

$\begin{array}{rcl}v & = & 30 - 9.8 \times 2\\& = & 30 - 19.6\\& = & \mathbf{10.4}\\\end{array}\\\text{The velocity is}\textbf{ up}}$

3. Acceleration

The vertical acceleration is always -g = -9.8 m·s⁻².

The direction of the acceleration is down.

The only option with the sequence "up, up, down" is B.

6 0

3 years ago

Copernicus's model of the universe differs from Ptolemy's because Copernicus believed

Aneli [31]

Answer:

That the Sun was the center of the universe.

Explanation:

Ptolemy believed in geocentrism, which means that the Earth is the center of the Universe. This was also supported by Aristotle. Copernicus on the other hand believed in a heliocentric system, which proposes that the sun is the center of the universe.

4 0

3 years ago

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