If this speed is based on what would be safe in wet weather, estimate the radius of curvature for a curve marked 45 km/hkm/h . the coefficient of static friction of rubber on wet concrete is î¼s=0.7î¼s=0.7, the coefficient of kinetic friction of rubber on wet concrete is î¼k=0.5î¼k=0.5
Solved
Show answers
More tips
- A Auto and Moto What is the Average Lifespan of an Engine in a Car?...
- P Photography and Videography Understanding HDR: How It Works and Why You Need It...
- P Photography and Videography How to Choose the Perfect Photo Paper for Your Images?...
- C Computers and Internet How to Choose an Uninterruptible Power Supply (UPS) for Your Computer: Expert Tips...
- S Science and Technology How to choose a home theater system?...
- A Auto and Moto How to Choose a Car Wash? Tips and Recommendations...
- A Animals and plants How ants survive winter: exploring the secrets of their winter life...
- C Construction and repair How to Choose the Best Underfloor Heating?...
- S Sport When is the Champions League final?...
- S Sport When and Where Will the 2014 World Cup be Held?...
Answers on questions: Physics
- P Physics A student attaches a 20 ohm resistor to a battery and measures a current of 0.30 A. What is the voltage of the battery?...
- P Physics Identify the wave behavior in Picture 1 and Picture 2. What would the model for each look like? The picture is below....
- P Physics What kind of energy does a flying bullet have?...
- P Physics Please help The diagram shows the life cycle of a butterfly 5 Which statement best explains the process occurring in step 5 of the diagram? A. An adult s wings expand,...
- P Physics A stone is dropped from the top of a high cliff with zero initial velocity. In which system is the net momentum zero as the stone falls freely...
- P Physics Sam blew up a balloon and rubbed it on his head. then he stuck the balloon on the wall. this was all the result of electrostatics or the transfer of charge. the...
- P Physics The weight of a 100 n laser printer is spread over 0.5m2. what is the pressure it exerts? a) 50 n/m2 b) 200 n/m2 c) 500 n/m2...
- E English How do the children s interactions with the man in the well reveal the theme of the text? use at last two pieces of evidence ln your response...
- G Geography Describe how the piedmont region and the coastal plain region differ based on their locations in georgia....
- P Physics He tune-up specifications of a car call for the spark plugs to be tightened to a torque of 47 n⋅m . you plan to tighten the plugs by pulling on the end of a 25-cm-long...
Ответ:
r = 22.78 m
Explanation:
For this exercise let's use Newton's second law
Axis y
N- W = 0
N = W
X axis
F = m a
Where the acceleration is centripetal
a = v² / r
The force is the friction that the formula has
fr = μ N
fr = μ mg
Let's replace
μ m g = m v² / r
r = v² / μ g
Let's reduce the speed to the SI system
v = 45 km / h (1000 m / 1 km) (1h / 3600 s) = 12.5 m / s
r = 12.5 2 / (0.7 9.8)
r = 22.78 m
Ответ:
Explanation:
6 examples
radio wave
infrared ray
visible light ray
ultraviolet ray
microwave
gamma ray
3 which are useful
infrared ray
radio waves
gamma ray