Given that s=0, solve the equation s=ut + 1/2at^2 for the two possible values of t.
- t=0, t=-2u/a.
- t=0, t=a/2u.
- t=0, t=2u/a.
Explanation
With s = 0, the equation ut + 1/2 at^2 = 0 factors to t(u + 1/2 at) = 0. One root is t = 0; the other comes from u + 1/2 at = 0, giving t = -2u/a.
Richiegeee asking:
Hi, can some please explain?
Community Comments (1)
A
alland Posts: 1 24.02.2015 / 09:19
0=ut + ½at^2
remove t as a common factor
which leaves t(u + ½at)= 0
equate t=0 and
u + ½at = 0
½at= -u
t = -2u/a
remove t as a common factor
which leaves t(u + ½at)= 0
equate t=0 and
u + ½at = 0
½at= -u
t = -2u/a
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