NATS 1945 Lecture Notes - Lecture 3: Solid-Fuel Rocket, Net Force

• School: York University
• Department: Natural Science
• Course: NATS 1945
• Professor: Robin Metcalfe

Document Summary

Ne(cid:449)to(cid:374)(cid:859)s 2nd law: the acceleration (a) of an object due to an applied force (f) is related to the o(cid:271)je(cid:272)t(cid:859)s (cid:373)ass (cid:894)(cid:373)(cid:895) f = ma. N(cid:859)s 2nd law is a mathematical relationship between force and acceleration. Acceleration: is the rate at which an object speeds up or slows down. E(cid:454)a(cid:373)ple of a (cid:272)o(cid:374)se(cid:395)ue(cid:374)(cid:272)e of n(cid:859)s 2nd la(cid:449). It is simply the ejection of engine parts that a spacecraft no longer needs once that part has already been used up. Free-fall: falling in the absence of forces besides gravity; all objects free-fall at rate g (cid:894)(cid:858)a(cid:272)(cid:272)ele(cid:396)atio(cid:374) due to g(cid:396)a(cid:448)it(cid:455) (cid:895) (cid:894)f(cid:396)ee-fall acceleration rate) The relationship between mass and acceleration has an important consequence for the rate at which objects fall. For about 2000 years most people believed when objects fall to the ground, the heavier objects will land first, this was taught by the ancient greek philosopher, aristotle. He believed that objects fall because anything made from the.