9. A car is 40 metres from a traffic light, driving at 55 km/h, when the light turns red. At that moment, the car slows down with constant acceleration a until it stops at the traffic light.

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QUESTION 9

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9. A car is 40 metres from a traffic light, driving at 55 km/h, when the light turns red. At
that moment, the car slows down with constant acceleration a until it stops at the traffic
light.
Transcribed Image Text:9. A car is 40 metres from a traffic light, driving at 55 km/h, when the light turns red. At that moment, the car slows down with constant acceleration a until it stops at the traffic light.
• Write down the formulas for the velocity v and for the positions of the car. You may
assume that at time t = 0 the car was at position s0= 0, and that was the moment
when the car started do brake.
• Find the acceleration a, and the time T that it takes for the car to come to a full stop,
from the moment it started to brake.
Transcribed Image Text:• Write down the formulas for the velocity v and for the positions of the car. You may assume that at time t = 0 the car was at position s0= 0, and that was the moment when the car started do brake. • Find the acceleration a, and the time T that it takes for the car to come to a full stop, from the moment it started to brake.
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