Consider someone driving down the highway at 70 miles per hour (31.3 m/s). The total mass...
Consider someone driving down the highway at 70 miles per hour (31.3 m/s). The total mass of the driver and their car (as well as everything else in the car) is 1600kg.
Part A- How much work must friction do to make the car stop?
Part B- A tree suddenly falls on the highway 55m in front of the car, and the driver just barely manages to stop before hitting the tree. What is the magnitude of the force of friction necessary to do the work you calculated in part A just before the car hits the tree?
Part C- Now imagine that the driver had been traveling at 75 miles per hour (33.5 m/s) at the start instead. The coefficient of friction is still the same, so the force from friction will still be what you calculated in part B, which means the work done by friction will be the same as in part A. Under these circumstances, what will the car's speed be when it hits the tree?
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Consider someone driving down the highway at 70 miles per hour
(31.3 m/s). The total mass...
Consider someone driving down the highway at 70 miles per hour (31.3 m/s). The total mass...
Consider someone driving down the highway at 70 miles per hour (31.3 m/s). The total mass of the driver and their car (as well as everything else in the car) is 1300kg. A) How much work must friction do to make the car stop? I got −6.37×10^5 J B) A tree suddenly falls on the highway 60m in front of the car, and the driver just barely manages to stop before hitting the tree. What is the magnitude of the...
Consider someone driving down the highway at 70 miles per hour (31.3 m/s). The total mass...
Consider someone driving down the highway at 70 miles per hour (31.3 m/s). The total mass of the driver and their car (as well as everything else in the car) is 1600kg. How much work must friction do to make the car stop?
The speed limit on a particular city street is 45 miles per hour (which is 20...
The speed limit on a particular city street is 45 miles per hour (which is 20 m/s). A driver approaching a stop light slams on their brakes, locking the wheels of their car in place so that they no longer rotate. Part A If the coefficient of friction between the car's tires and the street is 0.9, what is the minimum distance the driver would need to start braking in order to stop before the intersection? Part B When it...
The speed limit on a particular city street is 45 miles per hour (which is 20...
The speed limit on a particular city street is 45 miles per hour (which is 20 m/s). A driver approaching a stop light slams on their brakes, locking the wheels of their car in place so that they no longer rotate. If the coefficient of friction between the car's tires and the street is 0.9, what is the minimum distance the driver would need to start braking in order to stop before the intersection?
all parts 11/20/2015 Test #5 P 250 pblem 3: A 500 kg car is traveling 35...
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parts
11/20/2015 Test #5 P 250 pblem 3: A 500 kg car is traveling 35 m/s down the highway when it swerves to avoid a t in the road. The car, still traveling 35 m/s runs head-on into a tree and stops instantly. Show your work or explain your answer. A numerical answer without work or an explanation receives zero eredit. A)(4pt) What is the momentum of the car just before it strikes the tree? B) (4pt) The car...
Review PartA You're driving down the highway late one night at 20 m/s when a deer...
Review PartA You're driving down the highway late one night at 20 m/s when a deer steps onto the road 41 m in front of you Your reaction time before stepping on the brakes is 0.50 s, and the maximum deceleration of your car is 10 m/s? How much distance is between you and the deer when you come to a stop? Express your answer to two significant figures and include the appropriate un Value You have already submitted this...
2. Suppose a car travels 108 km at a speed of 20.0 m/s, and uses 2.20...
2. Suppose a car travels 108 km at a speed of 20.0 m/s, and uses
2.20 gallons of gasoline. Only 30% of the gasoline goes into useful
work by the force that keeps the car moving at constant speed
despite friction. (The energy content of gasoline is 1.3 ✕
108 J per gallon.)
(a) What is the force exerted to keep the car moving at constant
speed?
N
(b) If the required force is directly proportional to speed, how
many...
Risk management in Information Security today Everyday information security professionals are bombarded with marketing messages around...
Risk management in Information Security today Everyday information security professionals are bombarded with marketing messages around risk and threat management, fostering an environment in which objectives seem clear: manage risk, manage threat, stop attacks, identify attackers. These objectives aren't wrong, but they are fundamentally misleading.In this session we'll examine the state of the information security industry in order to understand how the current climate fails to address the true needs of the business. We'll use those lessons as a foundation...
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11/20/2015 Test #5 P 250 pblem 3: A 500 kg car is traveling 35 m/s down the highway when it swerves to avoid a t in the road. The car, still traveling 35 m/s runs head-on into a tree and stops instantly. Show your work or explain your answer. A numerical answer without work or an explanation receives zero eredit. A)(4pt) What is the momentum of the car just before it strikes the tree? B) (4pt) The car...
Review PartA You're driving down the highway late one night at 20 m/s when a deer steps onto the road 41 m in front of you Your reaction time before stepping on the brakes is 0.50 s, and the maximum deceleration of your car is 10 m/s? How much distance is between you and the deer when you come to a stop? Express your answer to two significant figures and include the appropriate un Value You have already submitted this...
2. Suppose a car travels 108 km at a speed of 20.0 m/s, and uses
2.20 gallons of gasoline. Only 30% of the gasoline goes into useful
work by the force that keeps the car moving at constant speed
despite friction. (The energy content of gasoline is 1.3 ✕
108 J per gallon.)
(a) What is the force exerted to keep the car moving at constant
speed?
N
(b) If the required force is directly proportional to speed, how
many...
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