How long will it take the rabbit to come to a momentary complete stop

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In summary, the conversation is discussing the time it will take for a rabbit to come to a complete stop using given equations. The attempted solution provided a time of 3.33 seconds, but there is confusion about the "entire length of travel" which spans 3.4 seconds. There is some discrepancy in the numbers, but the given answer is deemed correct.
  • #1
mcohen519
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Homework Statement



Using the equations from question 1 determine how long it will take the rabbit to come to a complete momentary stop.

Homework Equations



X= 30cm + (-40 cm/s)t + (24 cm/s^2)t^2

V= (-40cm/s) + (12 cm/s^2)t

V^2= (-40 cm/2)^2 + 2(12 cm/s^2)[X-30cm]

The Attempt at a Solution



I have attempted to work this using the middle equation and come up with an answer of 3.33 seconds for the rabbit to stop. However, the entire length of travel of the rabbit is 3.4 sec. Need help finding what I am missing. thanks
 
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  • #2
Can you give some more details about what the first question was? Like numbers and stuff
 
  • #3
The answer you have is correct. But what do you mean by "the entire length of travel"?
 
  • #4
The entire graph spans from 0 to around 3.4 seconds of travel time.
 
  • #5
Hmm, weird. But it is a difference of 0,07. Are you sure it's significant?
 

1. How is the speed of the rabbit measured?

The speed of the rabbit can be measured using a stopwatch or a speedometer.

2. What factors affect the time it takes for the rabbit to come to a complete stop?

The factors that affect the time it takes for the rabbit to come to a complete stop include its initial speed, the surface it is running on, and the amount of friction between the rabbit's feet and the surface.

3. Can the rabbit come to a complete stop instantly?

No, the rabbit cannot come to a complete stop instantly. It needs time to slow down and overcome the momentum it has built up while running.

4. How can the time it takes for the rabbit to come to a complete stop be calculated?

The time it takes for the rabbit to come to a complete stop can be calculated using the equation t = v/a, where t is time, v is initial velocity, and a is acceleration.

5. Does the weight of the rabbit affect the time it takes for it to come to a complete stop?

Yes, the weight of the rabbit can affect the time it takes for it to come to a complete stop. A heavier rabbit will have more momentum and will take longer to slow down compared to a lighter rabbit.

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