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Dvinal [7]
2 years ago
12

Một vật chuyển động từ A đến B cách nhau 90m . Trong nữa đoạn đường đầu vật đi với vận tốc v2 =5m/s , giữa đoạn đường còn lại vậ

t chuyển động với vận tốc v2=3m/s. Sau bao lâu vật đến B
Physics
1 answer:
Rainbow [258]2 years ago
6 0

お前なに言ってんのか全然わかんない...

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Consider an old-fashion bicycle with a small wheel of radius 0.17 m and a large wheel of radius 0.92 m. Suppose the rider starts
Gala2k [10]

Answer:

10259.6 m

Explanation:

We are given that

Radius of small wheel,r=0.17 m

Radius of large wheel,r'=0.92 m

Initial velocity,u=0

Time,t=2.7 minutes=162 s

1 min=60 s

Velocity,v=10m/s

Time,t'=13.7 minutes=822 s

Time,t''=4.1 minutes=246 s

v=u+at

Substitute the values

10=0+162a=162a

a=\frac{10}{162}=0.0617m/s^2

s=ut+\frac{1}{2}at^2

Substitute the values

s=\frac{1}{2}(0.0617)(162)^2=809.6 m

s'=vt'=10\times 822=8220 m

a'=\frac{v}{t''}=\frac{10}{246}

s''=\frac{1}{2}a't''^2=\frac{1}{2}\times \frac{10}{246}(246)^2=1230 m

Total distance traveled by rider=s+s'+s''=809.6+8220+1230=10259.6 m

6 0
3 years ago
Read 2 more answers
A force of 900 N is applied to a 9kg object. How fast will it accelerate?
saul85 [17]

Answer:  15 m/s2

Explanation: I hope this helps or right because I learned this a few months ago

7 0
1 year ago
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IM SO CONFUSED HELP! What makes the light react the way it does? (Other than the fact that it’s shining on different things)
xenn [34]
This is because, different colored object absorbs differnt wavelenght of light making it appears with different color. There is a spectrum of white light in which red have the longest wavelength.
Hope this will help.
6 0
3 years ago
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When a car of mass 1167 kg accelerates from 10.0 m/s to some final speed, 4.00  10 5J of work are done. Find this final speed.
Akimi4 [234]
  • Mass=1167kg
  • Initial velocity=u=10m/s
  • Acceleration=a=4m/s^2
  • Work done=105J=W
  • Final velocity=v=?
  • Force=F
  • Distance=d

Apply Newton's second law

\\ \tt\hookrightarrow F=ma

\\ \tt\hookrightarrow F=1167(4)=4668N

Now

\\ \tt\hookrightarrow W=Fd

\\ \tt\hookrightarrow d=\dfrac{W}{F}

\\ \tt\hookrightarrow d=\dfrac{105}{4668}

\\ \tt\hookrightarrow d=0.022m

Now

  • d be s

According to third equation of kinematics

\\ \tt\hookrightarrow v^2=u^2+2as

\\ \tt\hookrightarrow v^2=10^2+2(4)(0.022)

\\ \tt\hookrightarrow v^2=100+8(0.022)

\\ \tt\hookrightarrow v^2=100+0.176

\\ \tt\hookrightarrow v^2=100.176

\\ \tt\hookrightarrow v=10.001m/s

8 0
2 years ago
Having landed on a newly discovered planet, an astronaut sets up a simple pendulum of length 1.25 m and finds that it makes 419
Zina [86]

Answer:

g=2406.8m/s^{2}

Explanation:

firstly we have to find the frequency and then the angular frequency.

The frequency will be:

   f=\frac{419}{60} \\f=6.98Hz

The angular frequency is:

ω=2\pi f

ω=2*\frac{22}{7} *6.98

ω=43.88rad /sec

Now we can apply simple pendulum relationship

ω=\sqrt{\frac{g}{l} }

make g the subject of the formula

g=w^{2} l\\g=43.88^{2} *1.25\\g=2406.8m/s^{2}

6 0
3 years ago
Read 2 more answers
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