Homework Answers
Add Answer to:
Problem 11.34 A motorist is traveling at 54 km/h when she observes that a traffic light...
A motorist is traveling at 54 km/h when she observes that a traffic light 240 m ahead of her turns red. The traffic light is timed to stay red for 24 s.
A motorist is traveling at 54
km/h when she observes that a traffic light 240 m ahead of her
turns red. The traffic light is timed to stay red for 24 s. If the
motorist wishes to pass the light without stopping just as it turns
green again, determine (a) the required uniform deceleration of the
car, (b) the speed of the car as it passes the light.
Problem 2.66 Item 3 Review A motorist is driving at 20 m/s when she sees that...
Problem 2.66 Item 3 Review A motorist is driving at 20 m/s when she sees that a traffic light 200 m ahead has just turned red. She knows that this light stays red for 15 s, and she wants to reach the light just as it turns green again. It takes her 1.0 s to step on the brakes and begin slowing What is her speed as she reaches the light at the instant it turns green? Express your ar...
A truck traveling at 50 km/hr approaches a car stopped at a red light. When the...
A truck traveling at 50 km/hr approaches a car stopped at a red light. When the truck is 100 m from the car, the light turns green and the car immediately begins to accelerate at 2 m/s2 to a final speed of 100 km/hr. A) • How long does it take for the car to reach its maximum speed? B)During this time, how far does the car travel? C)What is the distance between the truck and the car 20 seconds...
At the instant the traffic light turns green, a car that has been waiting at an...
At the instant the traffic light turns green, a car that has been waiting at an intersection starts ahead with a constant acceleration of 3.2 m/s^2. At the same instant a truck, traveling with a constant speed of 20 m/s overtakes and passes the car. (a) How far beyond its starting point does the car overtake the truck? (b) How fast is the car traveling when it overtakes the truck?
A driver is traveling at a speed of 70 km/h in car A when he looks...
A driver is traveling at a speed of 70 km/h in car A when he looks down to text a friend that he is running late. Just before he looks down. he is 80 m from an intersection, and a bicydist B, traveling at a constant speed of 10m/s,s d= 40 m from that same intersection. The light turns red during the 3 s text, and when the driver looks up, he hits the brakes, causing a constant deceleration of...
The city is trying to figure out how long the traffic light should stay yellow at...
The city is trying to figure out how long the traffic light should stay yellow at an intersection. The speed limit on the road is 45.0 km/h and the intersection is 23.0 m wide. A car is traveling at the speed limit in the positive direction and can brake with an acceleration of ?5.20 m/s2. (a) If the car is to stop on the white line, before entering the intersection, what is the minimum distance from the line at which...
A person driving her car at a speed v= 38.0 km/h approaches an intersection just as...
A person driving her car at a speed v= 38.0 km/h approaches an intersection just as the traffic light turns yellow. She knows that the traffic light lasts only 1.5 sec, before turning to red, and she is a distance d= 30.0 m away from the near side of the intersection (see figure). The width of the intersection is w = 13.9 m. Her car's maximum deceleration is -5.50 m/s, and its maximum acceleration is 0.950 m/s2. - W -...
11.78 A car is traveling at a constant speed of 54 km/h when its driver sees...
11.78 A car is traveling at a constant speed of 54 km/h when its driver sees a child run into the road. The driver applies her brakes until the child returns to the sidewalk and then accelerates to resume her original speed of 54 km/h; the acceleration record of the car is shown in the figure. Assuming x = 0) when t = 0, determine (a) the time t, at which the velocity is again 54 km/h, (b) the position...
Constants Part A At the instant the traffic light turns green, a car that has been...
Constants Part A At the instant the traffic light turns green, a car that has been waiting at an intersection starts ahead with a constant acceleration of 2.80 m/s2. At the same instant a truck, traveling with a constant speed of 20.0 m/s, overtakes and passes the car How far beyond its starting point does the car overtake the truck? Express your answer with the appropriate units. FalueUnits Submit ▼ Part B How fast is the car traveling when it...
A person driving her car at 49.0 km/hr approaches an intersection just as the traffic light...
A person driving her car at 49.0 km/hr approaches an intersection just as the traffic light turns yellow. She knows that the yellow light lasts only 1.80 s before turning to red, and she is a distance D = 35.0 m away from the near side of the intersection. If she decides to stop, how far from the intersection will she come to a stop? The intersection is W =11.0 m wide. Her car's maximum deceleration is -5.70 m/s2. Ignore...
Problem 2.66 Item 3 Review A motorist is driving at 20 m/s when she sees that a traffic light 200 m ahead has just turned red. She knows that this light stays red for 15 s, and she wants to reach the light just as it turns green again. It takes her 1.0 s to step on the brakes and begin slowing What is her speed as she reaches the light at the instant it turns green? Express your ar...
A driver is traveling at a speed of 70 km/h in car A when he looks down to text a friend that he is running late. Just before he looks down. he is 80 m from an intersection, and a bicydist B, traveling at a constant speed of 10m/s,s d= 40 m from that same intersection. The light turns red during the 3 s text, and when the driver looks up, he hits the brakes, causing a constant deceleration of...
A person driving her car at a speed v= 38.0 km/h approaches an intersection just as the traffic light turns yellow. She knows that the traffic light lasts only 1.5 sec, before turning to red, and she is a distance d= 30.0 m away from the near side of the intersection (see figure). The width of the intersection is w = 13.9 m. Her car's maximum deceleration is -5.50 m/s, and its maximum acceleration is 0.950 m/s2. - W -...
11.78 A car is traveling at a constant speed of 54 km/h when its driver sees a child run into the road. The driver applies her brakes until the child returns to the sidewalk and then accelerates to resume her original speed of 54 km/h; the acceleration record of the car is shown in the figure. Assuming x = 0) when t = 0, determine (a) the time t, at which the velocity is again 54 km/h, (b) the position...
Constants Part A At the instant the traffic light turns green, a car that has been waiting at an intersection starts ahead with a constant acceleration of 2.80 m/s2. At the same instant a truck, traveling with a constant speed of 20.0 m/s, overtakes and passes the car How far beyond its starting point does the car overtake the truck? Express your answer with the appropriate units. FalueUnits Submit ▼ Part B How fast is the car traveling when it...
Most questions answered within 3 hours.
-
9.) You are buying a car that cost $26,500. You make payments of
$412 each month...
asked 7 minutes ago -
. Suppose a discrete random variable has probability
distribution
P(x) = .2 if x = 0...
asked 1 hour ago -
Problem #1
The area between Z = 0 and Z = 2.50
The area between Z...
asked 24 minutes ago -
Under the influence of its drive force, a snowmobile is moving
at a constant velocity along...
asked 1 hour ago -
Why do organizations decline? What steps can top
management take to halt, decline, and restore organizational...
asked 1 hour ago -
What mechanisms Drive speciation??
(I.e. what was Dawins theory on the orgin of species, and how...
asked 3 hours ago -
The manager at a car assembly plant believes that the mean
assembly time for a car...
asked 4 hours ago -
Which of the following is true of electron capture?
A) It decreases the nuclide's mass number...
asked 5 hours ago -
Assuming an efficiency of 43.10%, calculate the actual yield of
magnesium nitrate formed from 114.9 g...
asked 6 hours ago -
The highly pathogenic bacterium Clostridium
perfringens causes gangrene, a disease that results in the
destruction of...
asked 8 hours ago -
In the context of situation analysis, which of the following is
a category for analysis in...
asked 7 hours ago -
In a study of the gas phase decomposition of sulfuryl chloride
at 600 K SO2Cl2(g)SO2(g) +...
asked 8 hours ago