tryintosurviv
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Im sorry if this is in the wrong area ! and I know that this is the easiest question in the history of physics but I need help. I think some of the answers in the back of the text are wrong but I might be just the biggest idiot on the face of the Earth so feel free to point that out. anyways ...
If 100m sprinters accelerate from rest for 3.5 s at 2.8 m/s (squared) , how far have they ran to this point ? How long will it take them to complete the 100m sprint , assuming they maintain their speed the rest of the way ?
d= v1t + 1/2a t (squared)
I think ?
= 3.5 + 1/2 (2.8)(3.5) squared
= 3.5 + 1/2 (2.8)(12.3)
=3.5 + 34.2 divided by 2
= 3.5 + 17.2
= 20.7 sorry I don't have the division sign or superscript
and I can't do the rest of the question without having the first answer correct. The text says the answer is 17 m
HELP ! Please help a huge idiot
Homework Statement
If 100m sprinters accelerate from rest for 3.5 s at 2.8 m/s (squared) , how far have they ran to this point ? How long will it take them to complete the 100m sprint , assuming they maintain their speed the rest of the way ?
Homework Equations
d= v1t + 1/2a t (squared)
I think ?
The Attempt at a Solution
= 3.5 + 1/2 (2.8)(3.5) squared
= 3.5 + 1/2 (2.8)(12.3)
=3.5 + 34.2 divided by 2
= 3.5 + 17.2
= 20.7 sorry I don't have the division sign or superscript
and I can't do the rest of the question without having the first answer correct. The text says the answer is 17 m
HELP ! Please help a huge idiot