Question

If a car takes a banked curve at less than the ideal speed, friction is needed to keep it from sliding toward the inside of the curve (a real problem on icy mountain roads).

(a) Calculate the ideal speed to take a 125-m radius curve
banked at 14.0°.

Did you draw a free body diagram and label all forces acting on a
vehicle? km/h

(b) What is the minimum coefficient of friction needed for a
frightened driver to take the same curve at 25.0 km/h?

Identify the force that supplies the centripetal force needed to
keep a vehicle in this circular path.

Answer #1

If a car takes a banked curve at less than the ideal speed,
friction is needed to keep it from sliding toward the inside of the
curve (a real problem on icy mountain roads). (a) Calculate the
ideal speed to take a 105 m radius curve banked at 15°. Correct:
Your answer is correct. m/s (b) What is the minimum coefficient of
friction needed for a frightened driver to take the same curve at
30.0 km/h?

Highway curves are often banked to reduce a vehicle’s reliance
on friction when negotiating the turn: On a banked curve, there is
a centripetal component of normal force acting on the vehicle.When
the angle and speed are such that friction plays no role in a
vehicle’s motion in the curve, the nature of the road surface is
immaterial and thus the posted speed limit applies in both wet and
dry weather. Suppose the posted speed limit is 100 km/h on...

A race car drives at a speed of 20.0m/s around a circular track
banked inwards at an angle of 20.0o from the horizontal. The track
is icy, so there is no appreciable friction of the tires on the
track. Determine the radius of the track. Submit your answer in the
following form:
• List all the physical forces acting on the object. Which one
of them supplies a centripetal component?
• Give your numerical answer for the radius of the...

A race-car driver is driving her car at a record-breaking speed
of 225 km/h. The first turn on the course is banked at 15, and the
car’s mass is 1450 kg.
find :
a) Calculate the radius
of curvature for this turn.
b) Calculate the
centripetal acceleration of the car.
c) If the car
maintains a circular track around the curve (does not move up or
down the bank), what is the magnitude of the force of static
friction?...

A curve of radius 20 m is banked so that a 1100 kg car traveling
at 30 km/h can round it even if the road is so icy that the
coefficient of static friction is approximately zero. The
acceleration of gravity is 9.81 m/s 2 .
Find the minimum speed at which a car can travel around this
curve without skidding if the coefficient of static friction
between the road and the tires is 0.3. Answer in units of m/s.

A curve of radius 70 mm is banked for a design speed of 85 km/h
.
If the coefficient of static friction is 0.40 (wet pavement), at
what range of speeds can a car safely make the curve?
[Hint: Consider the direction of the friction force when
the car goes too slow or too fast.]
Express your answers using two significant figures separated by
a comma.
vmin, vmax = ????? km/h

A curve of radius 20 m is banked so that a 1000 kg car traveling
at 60 km/h can round it even if the road is so icy that the
coefficient of static friction is approximately zero. The
acceleration of gravity is 9.81 m/s 2 . ? Find the minimum speed at
which a car can travel around this curve without skidding if the
coefficient of static friction between the road and the tires is
0.2. Answer in units of...

ch 6
1:
It is generally a good idea to gain an understanding of the
"size" of units. Consider the objects and calculate the kinetic
energy of each one.
A ladybug weighing 37.3 mg
flies by your head at 3.83 km/h
.
×10
J
A 7.15 kg
bowling ball slides (not rolls) down an alley at 17.5 km/h
.
J
A car weighing 1260 kg
moves at a speed of 49.5 km/h.
5:
The graph shows the ?-directed force
??...

What tools could AA leaders have used to increase their
awareness of internal and external issues?
???ALASKA AIRLINES: NAVIGATING CHANGE
In the autumn of 2007, Alaska Airlines executives adjourned at
the end of a long and stressful day in the
midst of a multi-day strategic planning session. Most headed
outside to relax, unwind and enjoy a bonfire
on the shore of Semiahmoo Spit, outside the meeting venue in
Blaine, a seaport town in northwest
Washington state.
Meanwhile, several members of...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 20 minutes ago

asked 23 minutes ago

asked 44 minutes ago

asked 46 minutes ago

asked 55 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago