# Help [HAVE A FINAL TOMORROW]

I need some help desparately. My teacher allowed us to bring cards to the final with some equations, only my dumbass teacher lost it so I'm screwed atm. I need to know the essential equations for projectile motion (there's 6 I believe) and the ones for:

- Torque
- Simple Harmonic Motion
- Waves
- Fluid Statics
- Lenses/Mirros and Diffraction
- Magnetism
- Waves
- Gravitation

Any help would be GREATLY appreciated. I don't have much to offer except a lifetime worth of thanks. Please help as I am in a very desparate situation at the moment. Cheers.

Hootenanny
Staff Emeritus
Gold Member
I never memorise any equations for projectile motion, it is better to work through them from first principles. That way you can always do it. You can solve all project motion questions applying basic physics principles, however, three useful kinematic equations to remember are;

$$v = u + at$$

$$s = ut + \frac{1}{2}at^2$$

$$v^2 = u^2 + 2as$$

As for all the others, you should know all the required formulae off by heart. It sounds to me as if someone has not studied for their final.

vanesch
Staff Emeritus