February 22, 2017

Homework Help: Science ~conversions~

Posted by Maggie on Wednesday, December 5, 2012 at 5:31pm.

On my physics home work i have a question that puts the weight in grams, and i need to find the acceleration. I know that the formula is F=ma, and Force is in newtons, mass is in kg and acceleration is in m/s^2. but can you still find the acceleration by using grams with out converting? because when a converted the mass (1.5g) to kg (.0015kg) and then put it throught the equation the answer didn't fit with the problem.

the problem is asking the acceleration of a bug (1.5g) when a spider pulls it by a massless spider silk with .001N.

when i put in the formula without converting i get .0073m/s^2. which seems plausible.

but when i convert i get 7.3m/s^2. which would make a VERY fast spider....

so i guess my question is just:
do you HAVE to convert in order to get the correct answer

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