Car travelling along a straight road at 14m/s is approaching traffic l

1.	Car travelling along a straight road at 14m/s is approaching traffic lights .driver applies brakes and car comes to rest with constant retardation/deceleration. The distance from the point where brakes are applied to where the car comes to rest is 49 m. Find deceleration.
Answer» INITIAL velocity=14m/s Final velocity=0m/s Distance travelled=49m we know, ${v}^{2} = {u}^{2} + 2as$ 0=14^2+2*49a a=-196/98 a=-2m/s/s Deceleration=2m PER SECOND per second.

Car travelling along a straight road at 14m/s is approaching traffic lights .driver applies brakes and car comes to rest with constant retardation/deceleration. The distance from the point where brakes are applied to where the car comes to rest is 49 m. Find deceleration.

Answer»

INITIAL velocity=14m/s

Final velocity=0m/s

Distance travelled=49m

we know,

${v}^{2} = {u}^{2} + 2as$

0=14^2+2*49a

a=-196/98

a=-2m/s/s

Deceleration=2m PER SECOND per second.

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Car travelling along a straight road at 14m/s is approaching traffic lights .driver applies brakes and car comes to rest with constant retardation/deceleration. The distance from the point where brakes are applied to where the car comes to rest is 49 m. Find deceleration.

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