3.1-3.3 (ch 3-5)

Question 1

experiment to determine g

Answer 1

Use a trapdoor and electromagnet. Steel ball is hung from electromagnet. As soon as the electromagnet switches off,a timer activates and stops when the steel ball hits the trapdoor, breaking the circuit. this gives accurate time of flight with a known distance. use s = ut + 1/2 a t ^2

Question 2

experiment to investigate drag

Answer 2

use a pulley and ball in viscous fluid and tape on other side.
tape motion will be identical to ball motion.
use the dots per second and stance between dots to make a velocity against time graph. it will asymptote at y = k , where k is a random number

Question 3

moment of a force =

Answer 3

perpendicular distance x force
fxcos(y)