PPT5a - • R • Elevator moves down • Engines start...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Net Forces through Pictures Adding Forces If equal and opposite, resultant (net, equivalent) force is zero R Two forces unequal and opposite, resultant is R If more than 2 simultaneously, then add in pairs to “reduce” to single R r
Background image of page 1

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

View Full DocumentRight Arrow Icon
Elevator Physics Stationary initially, boarding at middle floor R W For objects that can travel VERTICALLY, you must remember that gravity (weight) IS PRESENT. “Engines start”: case 1
Background image of page 2
Background image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: • R • Elevator moves down • Engines start: case 2 • R • Elevator moves up Elevator Physics • Moving initially • R • • W • No change in motion • Case 1 • R • Elevator going down initially: speeds up • Elevator going up initially: slows down • Case 2 • R • Elevator moving down initially: slows down • Elevator moving up initially: speeds up...
View Full Document

This note was uploaded on 02/08/2011 for the course PHYS 151 taught by Professor Lim during the Winter '10 term at Drexel.

Page1 / 3

PPT5a - • R • Elevator moves down • Engines start...

This preview shows document pages 1 - 3. Sign up to view the full document.

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