Final answer:
The correct precaution to take when navigating a sharp right curve with a recommended maximum speed of 40 km/h is to decrease speed to maintain control and safety, especially on potentially slippery surfaces like icy roads. The correct option is c).
Step-by-step explanation:
In navigating a sharp right curve with a maximum recommended speed of 40 km/h, the precaution that should be taken is c) Decrease speed. When approaching a curve, it's important to slow down to maintain control of the vehicle and ensure safety, especially if the road conditions are less than ideal, such as being icy or wet.
Calculating Ideal Speed and Coefficient of Friction
- Calculate the ideal speed to take a 100 m radius curve banked at 15.0°.
- Determine the minimum coefficient of friction needed for a driver to safely navigate the curve at a slower speed, for instance, at 20.0 km/h.
To answer these calculations, you would use physics principles that involve centripetal force, frictional force, and the banking angle of the curve. Option c) is the correct one.