f=ma
f=force
m=mass
a=acceleration
therefore,
m=f/a
The values for force and acceleration are given in the problem. Plug them in to get mass.
"It takes a force of 109 N to lift a stone straight up. This force gives the stone an acceleration of 12 m/s^2. Calculate the mass of the stone."
My physics teacher tried to explain this problem to us, but he explained it so confusingly that I still don't get it (if that made sense.) Please help! Thanks!
4 answers
My teacher said something about subtracting the force of gravity (9.8 m/s^2) from the 12 m/s^2. I have no clue. I would love to have one of the online tutors comment on this, too. (please!)
The force has to support the weight, mg, plus the acceleration.
F= mg+ ma= m(g+a)
F= mg+ ma= m(g+a)
BobPursley--Thanks for correcting it! I was in too much of a hurry.
1 answer