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secondary 3 | E Maths
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Phy- car B undergoes a uniform acceleration of 5m/s^-2, fins time taken for car b to reach finishing line . please guide me soon this question thanks .
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The formula is
s = ut + 0.5at^2,
where:
s = distance = 400
u = initial velocity = 0
t = time, unknown
a = acceleration = 5
Hence,
400 = 0×t + 0.5(5)(t^2)
As you can see, 0×t = 0, so the equation is simplified to
400 = 0.5(5)(t^2)
t^2 = 160