I have a follow-up to my question at 4:10 about work because I still can't figure it out.

F-F(friction)=ma
F-F(friction)=2*3
F-2.5=2*3
F=2*3 + 2.5
W=Fd
W=(2*3 + 2.5)4
Distributing the "4" I get
W=2*3*4 +2.5*4
Please help in pointing out where I have gone wrong. Thanks

You are correct, that is right. I typed the distance wrong on the friction term.

Thank you so much!!!

It seems like you are trying to calculate the work (W) done by a force (F) using the equation W = Fd, where d is the distance. However, there are a few errors in your calculations.

Firstly, in the equation F - F(friction) = ma, you correctly set up the equation to find the net force (F - F(friction)) acting on an object with mass (m) and acceleration (a). However, you wrote F - 2.5 = 2 * 3, which is incorrect. You should have written F - F(friction) = 2 * 3. To solve this equation, you need to know the value of the frictional force (F(friction)).

Once you have determined the value of F, you can proceed to calculate the work done using W = Fd. From your subsequent calculations, it seems like you are assuming a distance of 4 units for d. However, there doesn't seem to be any information provided about the distance in your original question.

To recap, make sure to correctly set up the equation for the net force, determine the value of the frictional force, and consider the given or known information about the distance to accurately calculate the work done.