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A car traveling at speed v takes distance d to stop after the brakes are applied. What is the stopping distance if the car is initially traveling at speed 7.0v? Assume that the acceleration due to the braking is the same in both cases. Express your answer using two significant figures.

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Trinidad Tremblay
Trinidad TremblayLv2
12 Feb 2020

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

A car with a mass of 1300 kg is initially moving at a speed of 40 km/h when the brakes are applied and the car is brought to a stop in 15 m. Assuming that the force that stops the car is constant, find (a) the magnitude of that force and (b) the time required for the change in speed. If the initial speed is doubled and the car experiences the same force during the braking, by what factors are (c) the stopping distance and (d) the stopping time multiplied?

The stopping distance of a vehicle is an important safety factor.Assuming a constant braking force, use the work-energy theorem toshow that a vehicle's stopping distance is proportional to thesquare of its initial speed. If an automobile traveling at 45 km/his brought to a stop in 50 m, what would be the stopping distancefor an initial speed of 90 km/h?

Answer: 200 m

. Consider two cars, a 700kg Porsche and a 600kg Honda Civic. ThePorsche is speeding along at 40 m/s (mph) and the Civic is goinghalf the speed at 20 m/s. If the two cars brake to a stop with thesame constant acceleration, lets look at whether the amount of timerequired to come to a stop or the distance traveled prior tostopping is influenced by their initial velocity.

1. A car traveling 5m/s slams on its brakes, creating anacceleration of -2 m/s2. How far did the car travel after itapplied its brakes? __________

2. The same car traveling for 10m/s applies the same accelerationof -2 m/s2. How far did the car travel after it applied its brakes?__________


I am obviously using the formula wrong.. wouldn't it be d=at^2

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