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3 years ago

What is the average velocity of Runner C for the first 15 seconds? Question 5 options: 1.3 m/s -2.7 m/s -1.3 m/s 2.7 m/s

Physics

2 answers:

kogti [31]3 years ago

7 0

Answer:

2.7 m/s

Explanation:

Took the test and got 100%

kipiarov [429]3 years ago

3 0

Answer:

Average velocity (v) of an object is equal to its final velocity (v) plus initial velocity (u), divided by two.

v¯¯¯=(v+u)2

Where:

v¯¯¯ = average velocity

v = final velocity

u = initial velocity

The average velocity calculator solves for the average velocity using the same method as finding the average of any two numbers. The sum of the initial and final velocity is divided by 2 to find the average. The average velocity calculator uses the formula that shows the average velocity (v) equals the sum of the final velocity (v) and the initial velocity (u), divided by 2.

Explanation:

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I., II., and IV. are examples of acceleration. III. isn't.

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4 years ago

Why do different substances have different melting and boiling points?

azamat

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3 years ago

True or False:A wind is a horizontal movement of air from an area of high pressure to an area of lower pressure.

Taya2010 [7]

Answer:

True

Explanation:

When the air blows from high pressure to an area of low pressure over the surface of the earth it is called wind.

The greater the pressure difference more is the speed of the wind. The instrument used to measure the speed of the wind is called an anemometer.

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3 years ago

A baseball is launched horizontally from a height of 1.8 m. The baseball travels 0.5 m before hitting the ground. How fast is th

zysi [14]

Answer:

0.83 m/s

Explanation:

FIrst of all, we have to find the time of flight, i.e. the time the baseball needs to reach the ground. This can be done by using the equation for the vertical motion:

$h=ut+\frac{1}{2}gt^2$

where

h is the initial height

u = 0 is the initial vertical velocity

g = 9.8 m/s^2 is the acceleration of gravity

t is the time

Substituting h = 1.8 m and solving for t,

$t=\sqrt{\frac{2h}{g}}=\sqrt{\frac{2(1.8)}{9.8}}=0.61 s$

We know that the horizontal distance travelled by the ball is

d = 0.5 m

Therefore, we can find the horizontal velocity (which is constant during the whole motion):

$v= \frac{d}{t}=\frac{0.5}{0.60}=0.83 m/s$

4 0

3 years ago

An student writes a bird that is divining for prey has speed of _ 10m/s what is wrong with the statement.

Anika [276]

Answer:

The description including its issue is summarized throughout the clarification portion below.

Explanation:

Speed would be a measurement of size. Which has only significance and therefore no path or guidance. Student says acceleration of -10m/s, therefore this assumption is incorrect because this same negative correlation indicates the path.
In reality, this same participant defined the speed (which seems to have two very different motion of an object).

4 0

3 years ago