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1. ### Physics - particle moving in space?

...j•k=0 k•i=0 .. k•j=0 .. k•k=1 speed = magnitude of the velocity vector |v_| = √(0^2 + 2^2 + 1^2) m/s = √5 m/s vector product, r_ x v_ = (i + 2j + 3k) x...

1 Answers · Science & Mathematics · 19/10/2011

2. ### The speed of a particle moving in a circle 2.0 m in radius increases at the constant rate of 4.4 m/s2. At an i?

total acceleration = a = vector = a(centripetal) (- i) + a (radial) j = v^2/r (- i) + (dv/dt) (j) i & j are unit vectors along radial and transverse sense...

2 Answers · Science & Mathematics · 12/07/2010

3. ### circular motion-physics help. easy problem. but i'm confused.?

...omega = 2*Pi/T omega = 0.910607 rad/s find velocity from angular velocity: v = omega*R v = 1.4225 m/sec To express a unit vector notation, it must...

1 Answers · Science & Mathematics · 03/06/2011

4. ### How can a moving electron in a Hydrogen atom be similar to a current, but in the opposite direction.?

I'm not an expert but: >>Cross sectional Area of a circle is A= 2πr... I thought a Area of a Circle is πr^2?

1 Answers · Science & Mathematics · 01/10/2011

5. ### Physics (2D Motion) Help Please?

http://physicsclassroom.com is the website you need to explore. select tutorials then select motion or vectors and read . a very helpful site as wellas supplying the formulae you need.

1 Answers · Science & Mathematics · 23/02/2010