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## Homework Statement

A particle with a charge of −2.50×10

^{-8}C is moving with an instantaneous velocity of magnitude 40.0 km/sec in the xy-plane at an angle of 50.0° counterclockwise from the +x axis.

1) What is the magnitude of the force exerted on this particle by a magnetic field with magnitude 2.00 T in the -x direction?

2) What is the direction of the force exerted on this particle by a magnetic field with magnitude 2.00 T in the +z direction?

Please, enter your answer as a counterclockwise angle from the +y direction to the direction of the force.

3) What is the magnitude of the force exerted on this particle by a magnetic field with magnitude 2.00 T in the +z direction?

## Homework Equations

F=|q|VBsin(θ)

## The Attempt at a Solution

I thought 1) would be: 0 N because the force is in the -z direction and I have no idea conceptually what I doing wrong here.

And I thought part 3) was (-2.50x10

^{-8})(4x10

^{5})(2)(sin(50)) but I was wrong and I'm not sure why.

Part 2) I have no idea what to do or how to get there.

I'm completely new here, but I've looked at past question and that has really helped a lot, so I was hoping more interaction would be even better.

Thanks guys, and please be as detailed as you can, I'm not sure why I'm not getting this...

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