Friday

March 6, 2015

March 6, 2015

Posted by **Joseph** on Thursday, January 13, 2011 at 8:48am.

- Physics -
**drwls**, Thursday, January 13, 2011 at 11:37amLet initial speed = Vo

Average speed while decelerating = Vo/2

X = 100 m

Time to decelerate to zero =

T = 2 X/Vo

also,

T = Vo/a.

Therefore

2X/Vo = Vo/a

Vo = sqrt(2 a X) = 14.1 m/s

T = 14.1/1 = 14.1 s

**Answer this Question**

**Related Questions**

physics - Consider a horizontal road with such a set of traffic lights, each ...

physics - A motorist is driving at 20m/s{\rm m/s} when she sees that a traffic ...

phys - A motorist is driving at 20m/s{\rm m/s} when she sees that a traffic ...

physics - The car stationary in front of a red traffic light. As the light turns...

physics - The car stationary in front of a red traffic light. As the light turns...

Physics - A car is going 20m/s when they see a traffic light 200m ahead turn red...

math - when a traffic light turns green, a car accelerates at a constant rate, ...

st joseph school - when a traffic light turns green, a car accelerates at a ...

science - When the front of a 5.0 m long bus traveling at a constant speed of 20...

Physics - A car is traveling at 11.0 m/s, and the driver sees a traffic light ...