Homework Help: Physics

Posted by Sarah on Wednesday, June 10, 2009 at 1:39pm.

In outer space, a constat net force of magnitude 140 N is exerted on a 32.5 kg probe initially at rest. (a) what acceleration does thie force produce? (b) how far does the probe travel in 10.0 s...

I got a which equals 4.31 m.s^2 but how do i solve for b

Physics - MathMate, Wednesday, June 10, 2009 at 2:18pm
Use
S=ut+0.5at²
S=distance travelled
u=initial velocity (=0)
t=10 s.
a=4.31 m/s/s

g is not involved because it is in outer space.
Physics - Sarah, Wednesday, June 10, 2009 at 2:32pm
where did you get the 0.5 ??
Physics - MathMate, Wednesday, June 10, 2009 at 2:35pm
actually the formula says
S=ut+at²/2
(ut plus half at²)
I now realize that the 0.5 is confusing.
Physics - Sarah, Wednesday, June 10, 2009 at 2:35pm
and i did 0(10) + 0.5(4.31 m/s/s)(10)^2= 225.5 and that is not right because the answer is 215
Physics - MathMate, Wednesday, June 10, 2009 at 2:40pm
You may have put in the wrong number on the calculator, because 431/2=215.5 ≈ 215

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