# Solving Newton's Laws: Friction & 10-kg Crate

• kenjiro310
In summary, the conversation discusses a problem in physics involving a worker pulling a 10-kg crate on a rough floor with coefficients of static and kinetic friction of 0.5 and 0.3, respectively. The worker pulls with a force of 40 N and the question is to determine the frictional force exerted by the surface. The conversation ends with a request for steps or hints on how to solve the problem.

#### kenjiro310

Hi guys I am new with physics and having a hard time wraping my head around things.

A worker pulls horizontally on a rope that is attached to a 10-kg crate resting on a rough floor. The coefficients of static and kinetic friction are 0.5 and 0.3, respectively. The worker pulls with a force of 40 N. The frictional force exerted by the surface is

A) 40 N B) 50 N C) 10 N D) 100 N E) 30 N

I would like to know the steps or hints on how to solve this?

kenjiro310 said:
Hi guys I am new with physics and having a hard time wraping my head around things.

A worker pulls horizontally on a rope that is attached to a 10-kg crate resting on a rough floor. The coefficients of static and kinetic friction are 0.5 and 0.3, respectively. The worker pulls with a force of 40 N. The frictional force exerted by the surface is

A) 40 N B) 50 N C) 10 N D) 100 N E) 30 N

I would like to know the steps or hints on how to solve this?
We can't give you the steps without your attempt, but for starters, how do you calculate (what are the equations) static and kinetic friction forces? Please follow the template as you post. And welcome to PF!

Ah sorry, new myself, sorry Phanthom.