Here I look at applying Newton’s 2^{nd} law of motion to simple lift style problems. I take you through typical diagrams and equations used for finding the tension in the cable and contact forces for a particle in the lift.

## Example

Here I look at applying Newton’s 2^{nd} law of motion to simple lift style problems. I take you through typical diagrams and equations used for finding the tension in the cable and contact forces for a particle in the lift.

shobhaDecember 26, 2016 at 6:14 pmvery helpful

SamJanuary 7, 2017 at 1:45 pmWhy couldnt we consider just the lift in part 2, without the crate? We had the acceleration (1.2) and the weight and mass of the lift…

JoshuaJanuary 10, 2017 at 11:58 amI’m unsure why we don’t consider the lift and only the crate in part 1

JacobFebruary 14, 2017 at 1:20 pmIf you considered the lift as a particle of 255 kg, you’d get an equation that is: 255g -150 – T = 255a.

Since you don’t know what the tension is, you can’t solve to find the acceleration.