Finding the force needed to decelerate a roller's translational motion

[Jane1948]

Homework Statement

I know the total frictional force required to stop a roller is 145 N, I know the frictional force required to decelerate rotary motion is Ia/r². But I don't know the formula to decelerate translational motion of the roller. Help!

Homework Equations

The Attempt at a Solution

 

[HallsofIvy]

Deceleratin is just acceleration with a negative acceleration!

 

[tiny-tim]

Welcome to PF!

Homework Statement

I know the total frictional force required to stop a roller is 145 N, I know the frictional force required to decelerate rotary motion is Ia/r². But I don't know the formula to decelerate translational motion of the roller. Help!

Hi Jane1948! Welcome to PF!

( And happy 60th birthday? )​

What sort of roller is this?

Is this a groundsman's roller, that works much like a wheelbarrow?

If so, I don't see where the friction comes in, since rolling things (without slipping) shouldn't be slowed down by friction with the ground.