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--- orbitalmechanics [2011/08/25 21:13] – donpdonp
+++ orbitalmechanics [2024/01/31 04:08] (current) – external edit 127.0.0.1
@@ Line 5: / Line 5: @@
 kg (175 lbs)
-k in earth's gravity (9.8m/s^2) creates 784 Newtons of downward force.
+kg in earth's gravity (9.8m/s^2) creates 784 Newtons of downward force.
 == Motor
@@ Line 11: / Line 11: @@
 http://en.wikipedia.org/wiki/Model_rocket_motor_classification
-Size J - 1,000 N*s (enough to overcome gravity)
+,000 N engine (enough to overcome rocket weight)
-== Questions
+== Launch
-Given that the motor has run for one second,
+The upward force is 216N.
+The motor runs for 1 second.
+== Questions
 What is the speed of the vehicle?
+N * 1s = 216 kg m/s (Unit of momentum)
+kg m/s / 80 kg = 2.7m/s
 What is the altitude of the vehicle?
+position = acceleration * time^2 / 2  (from two rounds of integration)
+.7 * 1^2 / 2 = 1.45m