Lecture04 - An elevator is being lifted at a constant speed...

Info iconThis preview shows pages 1–22. Sign up to view the full content.

View Full Document Right Arrow Icon
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
Background image of page 3

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

View Full DocumentRight Arrow Icon
Background image of page 4
Background image of page 5

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

View Full DocumentRight Arrow Icon
Background image of page 6
Background image of page 7

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

View Full DocumentRight Arrow Icon
Background image of page 8
Background image of page 9

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

View Full DocumentRight Arrow Icon
Background image of page 10
Background image of page 11

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

View Full DocumentRight Arrow Icon
Background image of page 12
Background image of page 13

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

View Full DocumentRight Arrow Icon
Background image of page 14
Background image of page 15

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

View Full DocumentRight Arrow Icon
Background image of page 16
Background image of page 17

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

View Full DocumentRight Arrow Icon
v Motor Cable Elevator An elevator is being lifted at a constant speed by a steel cable attached to an electric motor. There is no air resistance, nor is there any friction between the elevator and the walls of the elevator shaft. The upward force exerted on the elevator by the cable is A. greater than the downward force of gravity. B. equal to the force of gravity. C. less than the force of gravity. D. any of the above, depending on the speed of the elevator.
Background image of page 18
The graph to the right shows the velocity of an object as a function of time. Which of the graphs below best shows the net force versus time for this object? t v x 0 t Σ F x 0 A. t Σ F x 0 B. t Σ F x 0 C. t Σ F x 0 D. t Σ F x 0 E.
Background image of page 19

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

View Full DocumentRight Arrow Icon
A B F A. the acceleration is greater than if B were on the left and A were on the right. B. the acceleration is less than if B were on the left and A were on the right. C. the crates will not move if F is less than the combined weight of A and B. D. two of the above are correct E. none of the above is correct A lightweight crate ( A ) and a heavy crate ( B ) are side-by-side on a frictionless horizontal surface. If you apply a horizontal force F to crate A ,
Background image of page 20
You are standing at rest and begin to walk forward. What force pushes you forward? A. the force of your feet on the ground B. the force of your acceleration C. the force of your velocity D. the force of your momentum E. the force of the ground on your feet
Background image of page 21

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

View Full DocumentRight Arrow Icon
Image of page 22
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/25/2009 for the course PHYS 1501Q taught by Professor Bloomfield during the Fall '08 term at UConn.

Page1 / 30

Lecture04 - An elevator is being lifted at a constant speed...

This preview shows document pages 1 - 22. Sign up to view the full document.

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