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# m1 urgent help

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1. A particle P moves in a straight line with constant velocity. Initially P is at the point A with position vector (2i-j)m relative to a fixed origin O, and 2 seconds later it is at the point B with position vector (6i+j)m.

a) Find the velocity of P, the velocity is 2i+j

b) Find, in degrees to 1 d.p., the size of the angle between the direction of motion of P and the vector i.

Three seconds after it passes B the particle P reaches the point C.

c) Find, in m to 1 d.p., the distance OC.
2. (Original post by yeah1106)
A particle P moves in a straight line with constant velocity. Initially P is at the point A with position vector (2i-j)m relative to a fixed origin O, and 2 seconds later it is at the point B with position vector (6i+j)m.

a) Find the velocity of P, the velocity is 2i+j

b) Find, in degrees to 1 d.p., the size of the angle between the direction of motion of P and the vector i.

Three seconds after it passes B the particle P reaches the point C.

c) Find, in m to 1 d.p., the distance OC.
did you need help with all of it? or a specific bit?
(Original post by thefatone)
did you need help with all of it? or a specific bit?
4. (Original post by yeah1106)
Sketch and use triangles/trigonometry.
5. (Original post by yeah1106)
The direction of motion is the velocity vector.

So draw the vector i (horizontal line from the origin) and the vector 2i+j and use trig to find the angle between them.

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