Displacement word problem grade 11

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Homework Help Overview

The problem involves a scenario where a driver reacts to an obstacle on the road, requiring calculations related to displacement during the reaction time and subsequent deceleration of the vehicle. The subject area includes kinematics and motion analysis.

Discussion Character

  • Exploratory, Assumption checking, Mathematical reasoning

Approaches and Questions Raised

  • The original poster attempts to calculate the distance traveled during the reaction time using the formula for distance (distance = speed × time) but expresses uncertainty about the second part of the problem regarding deceleration. Other participants suggest verifying the calculations and exploring relevant formulas related to time, speed, and acceleration.

Discussion Status

Participants are actively engaging with the problem, with some providing calculations for the distance traveled during the reaction time. There is an exploration of applicable formulas for both parts of the question, but no consensus has been reached regarding the approach for the second part.

Contextual Notes

The discussion includes a focus on ensuring the correct application of formulas and units of measure, highlighting the importance of understanding the relationship between time, speed, and distance in the context of the problem.

max1020
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1. while driving a lady sees a cat run on the road and it takes her 0.80s to react and put her foot on the brake. her car is traveling 25 m/s. (a)how far will the car travel before she puts her foot on the brake and (b) if when the brake is applied the car decelerates at a uniform rate of 9.3 m/s^2, what is the total displacements in the car?





i tried dividing .80s by 25 m/s for (a) but i don't know if its right. and i have no idea how to do the (b)
 
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You take one step per second and you walk for 3 seconds how many steps do you take?

The lady is traveling at 25 meters/second and travels for 0.8 of a second before hitting the brake and how many meters does she travel?

for part b, show us what formulas you know that might apply to the problem and think I have time, speed and acceleration and want distance...
 
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jedishrfu said:
You take one step per second and you walk for 3 seconds how many steps do you take?

The lady is traveling at 25 meters/second and travels for 0.8 of a second before hitting the brake and how many meters does she travel?

for part b, show us what formulas you know that might apply to the problem and think I have time, speed and acceleration and want distance...

So I would multiply .80*25 which is 20m
 
max1020 said:
So I would multiply .80*25 which is 20m

Yes and you can check via units of measure m/s *s is meters.
 

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