If the resulting trajectory of the charged particle is a circle, what is , the angular frequency of the circular motion?Express in terms of ,w, m and B0 .

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.

An incident ray through the focal point of a spherical mirror will: reflect through the center of curvature. reflect back through the focal point. reflect parallel to the principle axis. reflect the same direction as the incident ray.

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.