![kymberlyasher](/avatars/33908.jpg)
kymberlyasher
16.12.2019 •
Physics
While riding a multispeed bicycle, the rider can select the radius of the rear sprocket that is fixed to the rear axle. the front sprocket of a bicycle has radius 12.0 cm. if the angular speed of the front sprocket is 0.600 rev/s, what is the radius of the rear sprocket for which the tangential speed of a point on the rim of the rear wheel will be 5.00 m/s? the rear wheel has radius 0.310 m.
Solved
Show answers
More tips
- F Food and Cooking 10 Reasons Why You Should Avoid Giving Re-Gifts: An Informative Guide...
- F Family and Home How to Sew Curtain Tapes: Best Tips from Professionals...
- A Animals and plants How to Grow Lime from a Seed: Simple Tips and Interesting Facts...
- C Computers and Internet How to Create a Folder on Your iPhone?...
- G Goods and services How to sew a ribbon: Tips for beginners...
- F Food and Cooking How to Make Mayonnaise at Home? Secrets of Homemade Mayonnaise...
- C Computers and Internet Which Phone is Best for Internet Surfing?...
- F Food and Cooking Everything You Need to Know About Pasta...
- C Computers and Internet How to Choose a Monitor?...
- H Horoscopes, Magic, Divination Where Did Tarot Cards Come From?...
Answers on questions: Physics
- P Physics How many like does it take to get to the center of a tosipop...
- B Business Coleman Manufacturing Co. s static budget at 10,000 units of production includes $40,000 for direct labor and $6,000 for electric power. Total fixed costs are $20,000....
- M Mathematics Which function represents exponential growth? a.f(x) = 3x b.f(x) = x^3 c.f(x) = x + 3 d.f(x) = 3^x...
Ответ:
2.8 cm
Explanation:
radius of front sprocket (R1) = 12 cm = 0.12 m
angular speed of the front sprocket (ω1) = 0.6 rev/s = 3.77 rad/s
radius of the rear wheel (R°2) = 0.31 m
tangential speed of the rear wheel (V°2) = 5 m/s
(take note that the tangential speed of the rear wheel is the same as that of the rear sprocket, V°2 = V2 (rear sprocket))
speed at any point on the front sprocket = speed at any point on the rear sprocket
V1 = V2 ....equation 1
tangential speed of the front sprocket (V1) = R1 x ω1V1 = 0.12 x 3.77 = 0.45 m/s
tangential speed of the rear sprocket (V2) = R1 x ω2take note that the speed of the rear wheel is the same as the speed of
the rear sprocket, which means ω2 is the same for both the rear
wheel and the rear sprocket. This also means we can use the
parameters for the rear wheel (V°2 and R2°) to find ω2
ω2 =![\frac{V°2}{R2°}](/tpl/images/0421/1539/1fa54.png)
ω2 =
= 16.1 rad/s
therefore V2 = R1 x ω2 = 16.1 x R1
recall that V1 = V2 ....equation 1
now we can put the values of V1 and V2 into equation 1
0.45 = 16.1 x R1
R1 = 0.45 / 16.1 = 0.028 m = 2.8 cm
Ответ:
4.725 kgm/s to the right
468.6 kgm/s southwest
1.782\times 10^{49}\ kgm/s1.782×1049 kgm/s forward
Explanation:
When the mass of an object is multiplied by its velocity we get momentum
m = Mass
v = Velocity
Proton
\begin{gathered}p=mv\\\Rightarrow p=1.67\times 10^{-27}\times 5.04\times 10^6\\\Rightarrow p=8.4168\times 10^{-21}\ kgm/s\end{gathered}p=mv⇒p=1.67×10−27×5.04×106⇒p=8.4168×10−21 kgm/s
The momentum of the proton is 8.4168\times 10^{-21}\ kgm/s8.4168×10−21 kgm/s upward
Bullet
\begin{gathered}p=mv\\\Rightarrow p=0.015\times 315\\\Rightarrow p=4.725\ kgm/s\end{gathered}p=mv⇒p=0.015×315⇒p=4.725 kgm/s
The momentum of the bullet is 4.725 kgm/s to the right
Sprinter
\begin{gathered}p=mv\\\Rightarrow p=71\times 6.6\\\Rightarrow p=468.6\ kgm/s\end{gathered}p=mv⇒p=71×6.6⇒p=468.6 kgm/s
The momentum of the sprinter is 468.6 kgm/s southwest
Earth
\begin{gathered}p=mv\\\Rightarrow p=5.98\times 10^{24}\times 2.98\times 10^4\\\Rightarrow p=1.782\times 10^{29}\ kgm/s\end{gathered}p=mv⇒p=5.98×1024×2.98×104⇒p=1.782×1029 kgm/s
The momentum of the sprinter is 1.782\times 10^{29}\ kgm/s1.782×1029 kgm/s forward