Posted by **Emily** on Friday, October 15, 2010 at 5:56pm.

A certain force made a 5.0 kg mass accelerate at 4.0 m/s^2. This same force made another object accelerate at only 0.8 m/s^2. Find the mass of the second object.

I have no idea how to do this.

Do i use m=1/a? What do i do?

- Physics -
**bobpursley**, Friday, October 15, 2010 at 5:58pm
F=m*a

F=5*4

F=M*.8

20=M*.8

- Physics -
**Emily**, Friday, October 15, 2010 at 6:02pm
So it's 20 x 0.8=16?

- Physics -
**bobpursley**, Friday, October 15, 2010 at 6:06pm
20=M*.8

divide each side by .8

- Physics -
**Emily**, Friday, October 15, 2010 at 6:08pm
Oh! thanks!

I understand it now :D

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