Question

The coefficient of kinetic friction between rubber tires and wet pavement is 0.50. The brakes are applied to a 1750kg car travelling 27.8m/s and the car skids to a stop. What is the size and direction of the force of friction that the road exerts on the car? What would be the size and direction of the acceleration on the car? How far would the car travel before stopping? If the tires of the car did not skid, the coefficient of friction would have been 0.75. Determine the new stopping distance for the car.

Answer #1

If the coefficient of kinetic friction between tires and dry
pavement is 0.93, what is the shortest distance in which you can
stop an automobile by locking the brakes when traveling at 30.1 m/s
?
Part B
On wet pavement, the coefficient of kinetic friction may be only
0.25. How fast should you drive on wet pavement in order to be able
to stop in the same distance as in part A? (Note:Locking
the brakes is not the safest way...

Part A) If the coefficient of kinetic friction between tires and
dry pavement is 0.74, what is the shortest distance in which you
can stop an automobile by locking the brakes when traveling at 23.1
m/s? d= (value) (units)?. Part B) On wet pavement, the coefficient
of kinetic friction may be only 0.25. How fast should you drive on
wet pavement in order to be able to stop in the same distance as in
Part A? (Note: Locking the brakes...

Traveling at 40.2 m/s, a driver applies the brakes to his
fast-moving car and skids out of control on a wet concrete
horizontal road. The 2000 kg car is headed directly toward a
student waiting to catch a bus to campus who is standing 58.0 m
down the road. Luckily, Superman is flying overhead and surveys the
situation. Knowing that the coefficient of kinetic friction between
rubber and rough wet concrete is .800, he determines that friction
alone will not...

A 1000 kg car is driving at a speed of 35 m/s on flat level
ground. A road hazard ahead causes the driver to slam on the
brakes, and the tires start to skid. a) If the pavement is dry (and
thus μk = 0.7) how far will they travel before coming to a stop? b)
If the pavement is wet, μk is reduced to 0.3. Now how far would
they travel before coming to a stop?

A car traveling at 45 mph on a poor, wet pavement has a braking
efficiency of 87%. The brakes were applied 100 feet before hitting
an obstacle in the road. The road is uphill for 40 feet and then is
level for the remainder of the way. The car had a maximum
coefficient of road adhesion in the sloped portion of the poor, wet
roadway and but as soon as it started going on the level portion
its coefficient of...

A car traveling at 45 mph on a poor, wet pavement has a braking
efficiency of 87%. The brakes were applied 100 feet before hitting
an obstacle in the road. The road is uphill for 40 feet and then is
level for the remainder of the way. The car had a maximum
coefficient of road adhesion in the sloped portion of the poor, wet
roadway and but as soon as it started going on the level portion
its coefficient of...

three 1500 kg cars are driving at 25m/s along the road. Car A is
on a flat portion of the road, car B is at the bottom of a hill and
car C is at the top of a hill. (a)Determine the normal force that
the road exerts on each car. Suppose each car suddenly brakes hard
and starts to skid. (b) Determine the magnitude and direction of
each car's acceleration. The coefficient of kinetic friction
between the tires and...

You are driving down IL-53 at 45 miles per hour in your 1325 kg
car. As you look down to check a text, a car 75 m in front of you
stops. It takes you 2.0 s to look at the text, realize there’s a
stopped car in front of you, and hit the brakes. Your car skids
along the concrete (µk=0.8 between rubber and dry concrete) and
slows. (a) How far does your car travel in those 2.0 s...

A car is traveling at 15 m/s on a horizontal road. The brakes
are applied and the car skids to a stop in 4.0 s. The coefficient
of kinetic friction between the tires and road is:
Select one:
a. 0.38
b. 0.69
A ball is thrown straight up with a speed of 36.0 m/s. How long
does it take to return to its starting point?
Select one:
a. 7.20 s
b. 10.2 s
c. 14.7 s
d. 11.0 s
e....

A 2300 kg car moving at an initial speed of 25 m/s along a
horizontal road skids to a stop in 50 m. (Note: When stopping
without skidding and using conventional brakes, 100 percent of the
kinetic energy is dissipated by friction within the brakes. With
regenerative braking, such as that used in hybrid vehicles, only 70
percent of the kinetic energy is dissipated.)
(a) Find the energy dissipated by friction. 718750 Incorrect:
Your answer is incorrect. kJ
(b) Find...

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