Question

A man pushes a chair across the floor by applying a force of 155N at an angle of 25-degrees South of East. The chair accelerates to the right along the floor at 1.20 m/s.

So far I got this
Fg = mg (m)(9.81) = ?
Fa = 155 N 25 Degrees S of E
Fax = 155cos(25) = 140.777 N
Fay = 155sin(25) = 65.50 N
a = 1.20 m/s/s
FN = ?
Fk = μFN = ?
μ = ?

Fnet = ma

How do I find FN? Is it the same as Fg? or Is it the same as Fay?

Answer 1

Since the floor is level, FN = Fg
The angles just indicate direction, not an incline.

Answer 2

Ah ok, but how do I find the mass then? Because it is not given.

Answer 3

F = ma
You have the force and the acceleration, so ...