1. Ja pendulum has a length of 0,500 m. What is the period of the pendulum? Use a value of 9.81 m/s for the local acceleration due to gravity. Give your answer
to two decimal places.

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.

Two carts, one of mass 2m and one of mass m, approach each other with the same speed, v. when the carts collide, they hook together. assume that positive momentum is to the right. which graph best represents the momentum of both carts over time, before and after the collision?

An element becomes a positively charged ion when itloses protons.loses electrons.gains electrons.gains neutrons.