An automobile traveling at speed v on a level surface approaches a brick wall. When the...
An automobile traveling at speed v on a level surface approaches a brick wall. When the automobile is at a distance d from the wall, the driver suddenly realizes that he must either brake or turn. If the coefficient of static friction between the tires and the surface is µ, what is the minimum distance that the driver needs to stop (without turning)? What is the minimum distance that the driver needs to complete a 90◦ turn (without braking)? What is the safest tactic for the driver?
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An automobile traveling at speed v on a level surface approaches
a brick wall. When the...
A driver traveling at 22 m/s slows down her 1500 kg car in order to not...
A driver traveling at 22 m/s slows down her 1500 kg car in order to not hit a brick wall. The distance between where she starts to brake and the wall is 75 meters. What is the average stopping force the driver experiences if she stops 5 meters before hitting the wall? (hint:the car takes 70 meters to stop, not 75) If the brake line bursts the driver decides to turn the in a wide arc parallel to the wall...
Brake or turn? Figure 6-45 depicts an overhead view of a car's path as the car...
Brake or turn? Figure 6-45 depicts an overhead view of
a car's path as the car travels toward a wall. Assume that the
driver begins to brake the car when the distance to the wall is
d = 109 m, and take the car's mass as m = 1430
kg, its initial speed as v0 = 37.0 m/s, and the
coefficient of static friction as μs = 0.530.
Assume that the car's weight is distributed evenly on the four
wheels,...
Flying Circus of Physics Brake or turn? The figure depicts an overhead view of a car's...
Flying Circus of Physics Brake or turn? The figure depicts an overhead view of a car's path as the car travels toward a wall. Assume that the driver begins to brake the car when the distance to the walls d - 111 m, and take the car's massas m - 1400 kg, its initial speed as 35.0 m/s, and the coefident of static friction -0.540. Assume that the car's is distributed evenly on the four wheels, even during braking. (a)...
Traveling at a speed of 16.7 m/s, the driver of an automobile suddenly locks the wheels...
Traveling at a speed of 16.7 m/s, the driver of an automobile suddenly locks the wheels by slamming on the brakes. The coefficient of kinetic friction between the tires and the road is 0.640. What is the speed of the automobile after 2.00 s have elapsed? Ignore the effects of air resistance. m/s
A box (350 kg) sits inside the trailer of a semitruck traveling at a speed of...
A box (350 kg) sits inside the trailer of a semitruck traveling at a speed of 15 m/s (~ 33 mph). Suddenly, a car in front of the truck stops in the road. The driver of the truck hits the brakes to bring the truck to a stop. Assume that the coefficient of static friction µs = 0.7 between the box and the floor of the trailer. Assume g = 10 m/s2. When the truck is slowing down, what is...
A car is traveling at 55.0 mi/h on a horizontal highway. (a) If the coefficient of...
A car is traveling at 55.0 mi/h on a horizontal highway. (a) If the coefficient of static friction between road and tires on a rainy day is 0.102, what is the minimum distance in which the car will stop? (b) What is the stopping distance when the surface is dry and ?s = 0.605?
A car is traveling at 53.0 mi/h on a horizontal highway. (a) If the coefficient of...
A car is traveling at 53.0 mi/h on a horizontal highway. (a) If the coefficient of static friction between road and tires on a rainy day is 0.100, what is the minimum distance in which the car will stop? m (b) What is the stopping distance when the surface is dry and µs = 0.604?
Spy Agent 001 is chasing the bad guys. Suddenly, 001 needs to turn his car (m...
Spy Agent 001 is chasing the bad guys. Suddenly, 001 needs to turn his car (m = 1000 kg) around, and completes a turn in the shape of a semi-circle (radius = 60 m) travelling at a constant speed of 27 m/s. a) If the static coefficient of friction between the tires and the pavement is 0.55, find the maximum force of friction before slipping occurs. b) Will the car be able to complete the turn without sliding? c) To...
Nardine is traveling southbound on a level section of the I5 freeway with speed v0 =...
Nardine is traveling southbound on a level section of the I5
freeway with speed v0 = 60mi/h. Joshua is also traveling
southbound a distance d directly behind Nardine with the same speed
v0 = 60mi/h. Nardine has ABS brakes in her car, while
Joshua does not have ABS brakes in his car. On this section of the
freeway, Nardine's tires have coefficients of friction of
and Joshua's tires have coefficients
. Nardine suddenly notices something blocking the road in front...
Problem-1 Nardine is traveling southbound on a level section of the 15 freeway with speed up...
Problem-1 Nardine is traveling southbound on a level section of the 15 freeway with speed up = 60mi/hr. Joshua is also traveling southbound a distanced directly behind Nardine with the same speed to 60mi/hr. Nardine has ABS brakes in her car, and Joshua does not have ABS brakes in his car. On this section of the freeway, Nardine's tires have coefficients of friction (M ) (0.7,0.5) and Joshua's tires have coefficients of friction of Walk) = (0.5, 0.3). Nardine suddenly...
Brake or turn? Figure 6-45 depicts an overhead view of
a car's path as the car travels toward a wall. Assume that the
driver begins to brake the car when the distance to the wall is
d = 109 m, and take the car's mass as m = 1430
kg, its initial speed as v0 = 37.0 m/s, and the
coefficient of static friction as μs = 0.530.
Assume that the car's weight is distributed evenly on the four
wheels,...
Flying Circus of Physics Brake or turn? The figure depicts an overhead view of a car's path as the car travels toward a wall. Assume that the driver begins to brake the car when the distance to the walls d - 111 m, and take the car's massas m - 1400 kg, its initial speed as 35.0 m/s, and the coefident of static friction -0.540. Assume that the car's is distributed evenly on the four wheels, even during braking. (a)...
Nardine is traveling southbound on a level section of the I5
freeway with speed v0 = 60mi/h. Joshua is also traveling
southbound a distance d directly behind Nardine with the same speed
v0 = 60mi/h. Nardine has ABS brakes in her car, while
Joshua does not have ABS brakes in his car. On this section of the
freeway, Nardine's tires have coefficients of friction of
and Joshua's tires have coefficients
. Nardine suddenly notices something blocking the road in front...
Problem-1 Nardine is traveling southbound on a level section of the 15 freeway with speed up = 60mi/hr. Joshua is also traveling southbound a distanced directly behind Nardine with the same speed to 60mi/hr. Nardine has ABS brakes in her car, and Joshua does not have ABS brakes in his car. On this section of the freeway, Nardine's tires have coefficients of friction (M ) (0.7,0.5) and Joshua's tires have coefficients of friction of Walk) = (0.5, 0.3). Nardine suddenly...
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