![shadowangel84](/avatars/47017.jpg)
shadowangel84
26.11.2019 •
Physics
During a very quick stop, a car decelerates at 7.00 m/s2 . (a) what is the angular acceleration of its 0.280-m-radius tires, assuming they do not slip on the pavement? (b) how many revolutions do the tires make before coming to rest, given their initial angular velocity is 95.0 rad/s ? (c) how long does the car take to stop completely? (d) what distance does the car travel in this time? (e) what was the car’s initial velocity? (f) do the values obtained seem reasonable, considering that this stop happens very quickly?
Solved
Show answers
More tips
- S Style and Beauty How are artificial nails removed?...
- S Style and Beauty Secrets of Tying a Pareo: 5 Ways...
- F Food and Cooking 10 Reasons Why You Should Avoid Giving Re-Gifts: An Informative Guide...
- S Sport How to wrap boxing hand wraps? Everything you need to know!...
- A Animals and plants 5 Tips for Taking Care of Yews to Keep Them Green and Beautiful...
- H Health and Medicine How to Calm Your Nerves? Expert Tips That Actually Work...
- O Other What is a Disk Emulsifier and How Does it Work?...
- S Sport How to Pump Your Chest Muscle? Secrets of Training...
- C Computers and Internet How to Get Rid of 3pic Infector: Everything You Need to Know...
- S Style and Beauty How to Grow Hair Faster: Real Methods and Advice...
Answers on questions: Physics
- P Physics 17 year old looking for boyfriend ;)...
- P Physics a bus moving at speed of 25m/s beginning to slow at rate 4m/s^2each second how long does it take to stop...
- P Physics A metal ball sits motionless on a flat surface. Which of these would make the ball move? A. The force of gravity becomes less. B. The force of gravity becomes greater....
- P Physics Describe sound as a wave....
- P Physics arry is making a model of the Solar System. What objects will Larry need to put in his model of the Solar System? Name hree types of objects. Describe where Larry...
- P Physics In the graph, during which time period does the particle undergo the greatest displacement? ab bc cd all distances covered in the marked regions are the same...
- P Physics If a substance forms crystals when it solidifies, its points are the same. a. melting and freezing b. melting and condensation c. evaporation and freezing d. evaporation...
- H Health 1. me & you by cassie 2. bad intetions by nikye heyton 3. Hey daddy by usher 4.Worthit 5.Valintine...
- M Mathematics HELP PLEASEEEEEEEEEE...
- M Mathematics Please urgent help on these two, no links...
Ответ:
-25 rad/s²
29 times
3.8 seconds
50.54 m
26.6 m/s
Explanation:
a = Acceleration = -7 m/s² (negative because of deceleration)
r = Radius of wheel = 0.28 m
Angular acceleration is given by
Angular acceleration of the wheel is -25 rad/s²
It took 3.8 seconds for the car to stop
The wheel rotated 29 times.
The
Initial velocity
The car’s initial velocity is 26.6 m/s
Distance covered in the time is 50.54 m
If the distance is found in meters we get 50.54 m which is very low. Considering the initial velocity is 95.76 km/h. Coming to a stop in that distance is very low. So, the values do not seem reasonable. At least a 100 m is required to stop from that speed.
Ответ:
Its B
Explanation: