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## Homework Statement

A student exerts a 30 N[E] force to push a 5 kg brick along a floor that exerts a 20 N[W] friction force.

Consider all forces.

*a. Calculate the acceleration.*

b. If the force is exerted for 5 seconds, calculate the velocity at the end of the

five seconds.

c. Calculate the new acceleration if the student stops pushing he brick after 5

seconds.

d. How long does it take the brick to stop?

b. If the force is exerted for 5 seconds, calculate the velocity at the end of the

five seconds.

c. Calculate the new acceleration if the student stops pushing he brick after 5

seconds.

d. How long does it take the brick to stop?

## Homework Equations

a=Fnet/m (I think?)

## The Attempt at a Solution

[/B]

a = 30N(E) / 5kg = 6m/s

But it states

__How do I consider the friction force into this?__

*consider all forces*.