P5 - v k j i i k j i 10 3 / 6 12 55 / 10 10 / 2 4 15 3 + =...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Discussion 5: Name: solutions TAM212, Fall, 2003 A 3-kg object A and a 10-kg object B undergo a central impact. Before impact, v B = -10 i (m/s), and v A = 15 i (m/s) They stick together after the collision. What is their combined velocity, after the collision? and, if the collision takes 2ms, what is the average impulsive force experienced by B during the collision? No external impulsive forces, so we can write Bf B Af A Bi B Ai A m m m m v v v v L + = + = 0 ()( ) () ( ) ( ) () ( ) () f kg kg s m kg s m kg s m kg v i i i 10 3 / 55 / 10 10 / 15 3 + = = + i v s m f / 23 . 4 = () () () () N s x s m kg m t dt ave Bi Bf B B ave t t 28850 10 2 / 10 23 . 4 10 3 2 1 = = = = = i i F v v L F F If time: What is their combined velocity if, instead of the velocity above, A has the velocity v A = 15 i + 4 j + 2 k (m/s) before the collision? Bf B Af A Bi B Ai A m m m m v v v v L + = + = 0 () ( ) ( ) () ( ) ( ) () ( ) ( ) () f kg kg s m kg s m kg s m kg
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: v k j i i k j i 10 3 / 6 12 55 / 10 10 / 2 4 15 3 + = + + = + + + ( ) s m f / 46 . 92 . 23 . 4 k j v + + = Discussion 5: Name: TAM212, Fall, 2003 A 3-kg object A and a 10-kg object B undergo a central impact. Before impact, v B = -10 i (m/s), and v A = 15 i (m/s) They stick together after the collision. What is their combined velocity after the collision? and, if the collision takes 2ms, what is the average impulsive force experienced by B during the collision? If time: What is their combined velocity if, instead of the velocity above, A has the velocity v A = 15 i + 4 j + 2 k (m/s) before the collision?...
View Full Document

Page1 / 2

P5 - v k j i i k j i 10 3 / 6 12 55 / 10 10 / 2 4 15 3 + =...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online