In: Physics
A car starts from rest at a stop sign. It accelerates at 4.4 m/s^2 for 6.9 s, coasts for 2.3 s, and then slows down at a rate of 3.4 m/s^2 for the next stop sign. How far apart are the stop signs? |
The car's journey between the stop signs can be divided into 3 parts.
1. Accelerating part
2. Constant speed part
3. Decelerating part.
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Distance covered in accelerating part
Use formula
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Use the formula to find the final velocity of the first part
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Consider the constant speed part (car is coasting)
Speed = Distance/Time
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Consider the decelerating part
Use formula
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Total distance between the stop signs,
ANSWER:
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