a racecar starts from rest and is accelerated uniformly to +41 m/s in 8.0 s.?

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a racecar starts from rest and is accelerated uniformly to +41 m/s in 8.0 s.?

what wil be the cars displacement

2007-02-04 19:18:44 · 2 answers · asked by Alex E 1 in Education & Reference ➔ Homework Help

2 answers

D= 0.5 * 41 * 0.8 * 0.8 =13.12 m

2007-02-04 19:26:33 · answer #1 · answered by samsung 1 · 0⤊ 0⤋

Relevant formulas are
(v + u)/t = a .............(1)
s = vt + 1/2at^2.........(2)

From (1), a = (41+0)/8 = 5.125

so in (2) : s = 41*8 + 0.5*5.125*8*8
= 328 + 164
= 492
= 41*8 + 0.5(0+41)
= 328 + 20.5
= 348.5

2007-02-05 05:25:53 · answer #2 · answered by Rascal 3 · 0⤊ 0⤋