PHYS 1P21 Lecture Notes - Lecture 9: Theodolite, Headon, Mass

• School: Brock University
• Department: Physics
• Course: PHYS 1P21
• Professor: Santo D' Agostino

Document Summary

Here are additional questions for your careful study. Deeply understand these situations, and you"ll have gone a long way towards a deep understanding of newton"s laws of motion. Q1: two small spherical metal balls of the same size and shape are dropped from the same height, about 10 m from the ground. One of the balls is twice as heavy as the other. The balls hit the ground at the same time, because the velocities of the balls are independent of the balls" masses. Analysis using newton"s laws of motion: the gravitational force exerted by the earth on an object of mass mis mg, at least near the earth"s surface. If air resistance is neglected, then this is the only force acting on each of the balls. Thus, by newton"s second law of motion, the acceleration of a ball with mass mis a= f/m a= mg/m a= g.