What is the relationship between the kinetic energy of molecules in an object and the object temperature

1) A plane lands on a runway with a speed of 125 m/s, moving east, and it slows to a stop in 13.0 s. What is the magnitude (in m

valentina_108 [34]

Answer: 1) a = 9.61m/s² pointing to west.

2) (a) Δv = - 37.9km/s

(b) a = - 6.10⁷km/years

Explanation: Aceleration is the change in velocity over change in time.

1) For the plane:

$a=\frac{\Delta v}{\Delta t}$

$a=\frac{125}{13}$

a = 9.61m/s²

The plane is moving east, so velocity points in that direction. However, it is stopping at the time of 13s, so acceleration's direction is in the opposite direction. Therefore, acceleration points towards west.

2) Total change of velocity:

$\Delta v = v_{f}-v_{i}$

$\Delta v = -17.1-(+20.8)$

$\Delta v= -37.9$ km/s

The interval is in years, so transforming seconds in years:

v = $\frac{-37.9}{3.15.10^{-7}}$

$v=-12.03.10^{7}$ km/years

Calculating acceleration:

$a=\frac{-12.03.10^{-7}}{2.01}$

$a=-6.10^{7}$

Acceleration of an asteroid is a = -6.10⁷km/years .

5 0

2 years ago

A baseball of mass 300-g is hit at a velocity of 40 m/s. If the ball is caught by the third baseman and the ball penetrates 2.0

OlgaM077 [116]

The force is -12,000 N

Explanation:

First of all, we calculate the acceleration of the ball, by using the following suvat equation:

$v^2-u^2=2as$

where:

v = 0 is the final velocity of the baseball (it comes to rest)

u = 40 m/s is the initial velocity

a is the acceleration

s = 2.0 cm = 0.02 m is the displacement of the ball

Solving for a,

$a=\frac{v^2-u^2}{2s}=\frac{0-40^2}{2(0.02)}=-40,000 m/s^2$

Now we can calculate the average force exerted on the ball, by using Newton's second law:

$F=ma$

where

m = 300 g = 0.3 kg is the mass of the ball

$a=-40,000 m/s^2$ is the acceleration

Substituting,

$F=(0.3)(-40,000)=-12,000 N$

where the negative sign indicates that the direction of the force is opposite to the direction of motion of the ball.

Learn more about forces:

brainly.com/question/8459017

brainly.com/question/11292757

brainly.com/question/12978926

#LearnwithBrainly

8 0

2 years ago

Our solar system is located very close to the center of the Milky Way galaxy, outside of the spiraling arms.

inna [77]

FALSE
IF IT WAS THEN IT WOULd BE TRUE

4 0

3 years ago

Read 2 more answers

a 320-foot tree casts a 130-foot shadow on horizontal ground. a girl lying on the grass at the tip of the shadow is looking at a

mixer [17]

Answer: $\theta =67.88^{\circ}$

Explanation:

Given

Height of tree is H=320 ft

length of shadow L=130 ft

let $\theta$ be the angle of elevation

using trigonometric relation

$\tan \theta =\frac{H}{L}$

$\tan \theta =\frac{320}{130}$

$\theta =tan^{-1}(2.461)$

$\theta =67.88^{\circ}$

7 0

2 years ago

A persons beliefs and general outlook, which Act like filters on the information they receive are called ?

lianna [129]

The correct answer is:

Consideration

<em>Consideration</em> is defined as the act of thinking something carefully, careful thought; meditation; deliberation. Consideration acts like filter on the information a person receives, because it allows them to contemplate the implications of something before acting on it.

7 0

3 years ago