Physics
posted by Emily .
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
F=m*a
F=5*4
F=M*.8
20=M*.8 
Physics 
Emily
So it's 20 x 0.8=16?

Physics 
bobpursley
20=M*.8
divide each side by .8 
Physics 
Emily
Oh! thanks!
I understand it now :D
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