Ask question

Ask question

All categories

2 years ago

5

A paper airplane is thrown horizontally with a velocity of 20 mph. The plane is in the air for 7.63 s before coming to a standst

ill on the ground. What is the acceleration of the plane?

1 answer:

Inessa05 [86]2 years ago

7 0

Answer:

-1.17 m/s²

Explanation:

Given:

v₀ = 20 mph = 8.94 m/s

v = 0 m/s

t = 7.63 s

Find: a

v = at + v₀

0 m/s = a (7.63 s) + 8.94 m/s

a = -1.17 m/s²

You might be interested in

Fiesta28 [93]

Answer:

Law of multiple proportions

8 0

2 years ago

By means of a rope whose mass is negligible, two blocks are suspended over a pulley, as the drawing shows, with m1 = 12.1 kg and

puteri [66]

Answer:

14.8 kg

Explanation:

We are given that

$m_1=43.7 kg$

$m_2=12.1 kg$

$g=9.8 m/s^2$

$a=\frac{1}{2}(9.8)=4.9 m/s^2$

We have to find the mass of the pulley.

According to question

$T_2-m_2 g=m_2 a$

$T_2=m_2a+m_2g=m_2(a+g)=12.1(9.8+4.9)=177.87 N$

$T_1=m_1(g-a)=43.7(9.8-4.9)=214.13 N$

Moment of inertia of pulley= $I=\frac{1}{2}Mr^2$

$(T_2-T_1)r=I(-\alpha)=\frac{1}{2}Mr^2(\frac{-a}{r})=\frac{1}{2}Mr(-4.9)$

Where $\alpha=\frac{a}{r}$

$(177.87-214.13)=-\frac{1}{2}(4.9)M$

$-36.26=-\frac{1}{2}(4.9)M$

$M=\frac{36.26\times 2}{4.9}=14.8 kg$

Hence, the mass of the pulley=14.8 kg

6 0

2 years ago

Steam is more dangerous than the boiling water because it has more a.Temperature

balandron [24]

Answer:

c) heat

Explanation:

steam has more heat energy than boiling water due to its latent heat of vaporisation.

4 0

2 years ago

The location movement and intensity of precipitation can be found by using?

vaieri [72.5K]

<span>Answer: Doppler radar
Doppler radar or weather radar is used to locate precipitation,</span> forecast future intensity, calculate or detecting its motion and estimates precipitation whether it is a rain, snow, hail or storm. They are also helpful in determining the structure of storms and its potential to cause severe weather.

Moreover, if a portion of the atmosphere becomes saturated with water vapor, it will condense and precipitate allowing Doppler radar to analyze and observe precipitation.

4 0

2 years ago

Which is a derived unit? <br> a.) kilogram <br> b.) joule <br> c.) micrometer <br> d.) millimeter

Dovator [93]

Joule us a derived unit

5 0

3 years ago

Read 2 more answers