Newton\'s Laws multiple objects 4. For a physics experiment, three scales are st
ID: 1447777 • Letter: N
Question
Newton's Laws multiple objects 4. For a physics experiment, three scales are stacked on top of each other in an elevator with an apple on top. Each scale is set up to read inNewtons and while the elevator is at rest the top scale reads 2N. The scales themselves are each 1kg, a. Analyze this problem while the elevator is at rest. Use Newton's II and III law to figure out what each scale reads. You should probably start by drawing a force diagram for each scale Elevator at Rest Scale A 2N Scale B Scale C b. Now analyze this situation for when the elevator is accelerating downwards with an acceleration of 1.5 m/s. What will each scale read inthis case? evator Accelerating Down Scale A Scale B Scale CExplanation / Answer
(a)
At Rest,
Scale A = 2N
Scale B = 2 N + 1*9.8 N
Scale B = 11.8 N
Scale C= 11.8 N + 1*9.8 N
Scale C = 21.6 N
(b)
Acellerating downward,
2N - FA = m*a
FA = 2N - m*a
Where m = 2/9.8
FA = 2 - 2/9.8 * 1.5
FA = 1.69 N
Scale A Reads, 1.69 N
FB = 11.8 - (11.8)/9.8 * 1.5
FB = 9.99 N
Scale B Reads, 9.99 N
FC = 21.6 - (21.8)/9.8 * 1.5
FC = 18.26 N
Scale C Reads, 18.26 N