Can someone please help me out with some of these questions?(adsbygoogle = window.adsbygoogle || []).push({});

1) A scientist runs to the east at 1.2m/s when he suddenly realises he forgot his chemicals at home. He then dashes at 4.6 m/s [North]. What is the scientists change in velocity?

So far I have 4.6 m/s - 1.2 m/s = 3.4, does anyone know what I am supposed to do with the directions?

2) (sorry I don't know how to put in the degree sign infront of the numbers, I will use ' instead) The velocity of a plane relative to the air is 320 km/h [E 35' S]A wind velocity relative to the ground is 75 km/H [E]. What is the velocity of the plane relative to the ground.

Again, in this one it's the direction (or angle) that makes me unsure of my answer, I am using the Vog = Vom + Vmg (velocity of object realtive to ground = velocity of medium relative to ground + velocity of object relative to medium) but the fact that the plane is flying at an angle of 35 degrees confuses me.

help would be appreciated

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# Homework Help: Kinematics (Vectors, fairly easy stuff)

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