- #1

thschica

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- 0

What equation do i use?

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In summary, the car traveled a distance of approximately 58.5 meters in 4.5 seconds while slowing down from a speed of 26.0 m/s to rest. The equation to use is s= (1/2)at2+ v0t, or alternatively, you can use the average speed formula if the acceleration is constant.

- #1

thschica

- 47

- 0

What equation do i use?

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- #2

HallsofIvy

Science Advisor

Homework Helper

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If the car slows from 26.0 m/s to rest (0 m/s) in 4.5 s then its acceleration is (0- 26)/4.5= -5.78 m/s

Do you know the formula s= (1/2)at

Actually, that's the "hard" way- for this problem you can use the fact that, with a constant acceleration, the "average" speed is just the average of the initial and final speeds. What is the average of 26.0 and 0? If you go at that average speed for 4.5 seconds, how far do you go? Do the problem both ways and compare the answers!

- #3

quicknote

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To calculate the distance traveled by the car in 4.50 seconds, we can use the equation:

d = (vi + vf)/2 * t

where d is the distance, vi is the initial velocity, vf is the final velocity, and t is the time.

Plugging in the given values, we get:

d = (26.0 m/s + 0 m/s)/2 * 4.50 s = 58.5 m

Therefore, the car traveled a distance of 58.5 meters in 4.50 seconds while slowing down from a speed of 26.0 m/s to rest. This calculation assumes that the car decelerated at a constant rate and did not experience any external forces.

The rate at which a car slows down is influenced by several factors, including the car's mass, speed, and the presence of external forces such as friction or air resistance.

The distance traveled by a car while slowing down is directly proportional to the initial speed. This means that the higher the initial speed, the longer the distance the car will travel while slowing down.

No, it is physically impossible for a car to come to a complete stop instantaneously. This is because the car's inertia causes it to continue moving forward, and it takes time for the brakes to slow it down.

The time taken for a car to slow down is directly proportional to its mass. This means that a heavier car will take longer to come to a complete stop than a lighter car, assuming all other factors are constant.

Friction plays a crucial role in a car slowing down. The friction between the brakes and the wheels creates a force that opposes the car's motion and ultimately brings it to a stop. Without friction, the car would continue moving forward even with the brakes applied.

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