A kid at the junior high cafeteria wants to propel an empty milk carton along a lunch table by hitting it with a 3.5 g spit ball. If he wants the speed of the 23 g carton just after the spit ball hits it to be .35 m/s, at what speed should his spit ball hit the carton?

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.

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

The crank oa rotates in the vertical plane with a constant clockwise angular velocity ω0 of 5.6 rad/s. for the position where oa is horizontal, calculate the force under the light roller b of the 10.6-kg slender bar ab.