How much force pull forward on the rope

[aligass2004]

Homework Statement

A 2m long, 600g rope pulls a 10kg block of ice across a horizontal, frictionless surface. The block accelerates at 1.7m/s^2. a.) How much force pulls forward on the ice? b.) How much force pull forward on the rope.

Homework Equations

The Attempt at a Solution

I solved part a by using T=m(Ax). I got 17N. I'm having trouble solving part b.

 

[Dick]

Word to the wise, Newton's third law.

 

[aligass2004]

I tried that already, and it didn't work.

 

[Dick]

You didn't include the force needed to accelerate the rope in addition to the block of ice.

 

[aligass2004]

And how do I do that?

 

[Dick]

Add the mass of the rope to the mass of the ice. Whatever is pulling has to pull both.

 

[aligass2004]

That worked. Thank you!