Smartphones ruining dinner and relationships?

An uplifted block of rock between two normal faults

Aparticle with mass 1.81×10−3 kg and a charge of 1.22×10−8 c has, at a given instant, a velocity v⃗ =(3.00×104m/s)j^. what are the magnitude and direction of the particle’s acceleration produced by a uniform magnetic field b⃗ =(1.63t)i^+(0.980t)j^?

Aball has an initial velocity of 3 m/s. if there is no friction, what is the highest it could roll?