To get better acceleration, you want to reduce the inertia of your bicycle. You have your choice of spending $45 on only one of three light-alloy items, each reducing the inertia of your bicycle by the same amount:

A. a new seat post,
B. a new set of pedals
C. a new set of wheel rims.

An electron moves with a constant horizontal velocity of 3.0 × 106 m/s and no initial vertical velocity as it enters a deflector inside a tv tube. the electron strikes the screen after traveling 26 cm horizontally and 19 cm vertically upward with no horizontal acceleration. what is the constant vertical acceleration provided by the deflector? (the effects of gravity can be ignored.)