What is the acceleration of a box weighing 666N if a force of 777N is applied to it​

Achild has maximum walking speed of 1.6 m/s. what is the length of the child's legs? 0.26 m

Which inventor was often called the lady edison

An electron moving at 5.06 103 m/s in a 1.23 t magnetic field experiences a magnetic force of 1.40 10-16 n. what angle does the velocity of the electron make with the magnetic field? there are two answers between 0° and 180°. (enter your answers from smallest to largest.)