a car is moving with 8m/sec, suddenly. breaks were applied and car stops after covering 20 meters. Find the acceleration of car?
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Answer:
- v = final velocity = 0
- u = initial velocity = 8m/s
- a = acceleration
- s = displacement = 20m
v² = u² + 2as
u² = –2as
8² = -2a20
64 = -40a
a = -64/40
a = -1.6m/s²
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