How Does the Angle of Incline Affect Train Motion Calculations?

[physicsgoon]

Homework Statement

A train moves on a straight track at y degrees to the horizontal. The mass of the train is 1000kg. during its motion the train moves under the action of a variable propulsive force, p Newtons, and a constant resultant forceR Newtons

(a) during the first stage of motion, the train moves horizontally with acceleration 0.25 ms-2. In this stage the value of P is 1200 sow that R = 950.

Homework Equations

F=ma mabey

The Attempt at a Solution

resolved the force in direction of train got;

1200 - R - siny^o = 1000 x 0.25
950 = R + siny^o

so how can R = 950, is siny^o taken as < 0.5??
help please!

 

[saltine]

In part (a) of the question, when it says the train is moving horizontally, it means that y=0^o.

 

[physicsgoon]

aaaaah you ledgend, cannot believe i didnt see that - i really am a physics goon!