What is the direction of the magnetic field?
The last time I had to do an emergency repair without the right equipment, we used 2 ratchet straps from the subframe to a solid garage beam. We also put two from the bars to another beam, but that was just to keep it stable. It actually worked really well, but it could have just as easily ended in disaster. It's just one of those things you end up having to do in an emergency.
And yet another alternative: Wood block under the frame and dig a hole under the rear wheel. This one lets you move the swingarm if needed - handy for wheel work.
It's your bike: Are you worried about it falling over (or on you), or not? I like to look at bike service and repair this way: If I stand a good chance of damaging the bike, or making it worse than it is, I take it to a pro.
answer is 3 because the right hand rule will show you which direction the force is on a plus charge if you point your fingers in the direction of the velocity and then point the thumb down then curl fingers in and thats the direction the magnetic field is pointing into the page
