Question
In: Physics
2) A racecar is driving at 40 m/s when a rabbit 100 m away runs across...
2) A racecar is driving at 40 m/s when a rabbit 100 m away runs across the track. It takes 0.8 seconds for the driving to slam on his breaks. If the car decelerates at 8.0 m/s2, how much time does the bunny have to get out of the way?
Solutions
Expert Solution
Initial speed of the car, 
Reaction time of the driver, 
Deceleration of the car, 
Initial distance between the car and rabbit, 
============
First, find the distance covered by the car during the reaction time
During reaction time, the brakes are not applied and the speed of the car is constant.
Speed = Distance/Time
Speed*Time=Distance
==============
Distance between the car and initial position of the rabbit when
the brakes are applied, 
==============
Use formula 
to find the time taken by the car to cover rest of the distance
while braking.
Solve the quadratic equation using a calculator
===================
Total time the rabbit have to get out of way, 
ANSWER: 
============================
genius_generous answered 2 years agoRelated Solutions
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