# WSU PHYSICS 101 - Lab 8 Data and Observation Kev, Taylor Ryan

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Rhodes Lubin Oliveria 1 Taylor Rhodes Kevin Lubin and Ryan Oliveira PSCI 111 Physics I Lab TA Harlan Heilman 8 March 2022 Lab 8 Data and Observations Pre Lab Notes Normal force is always horizontal to something ie The surface Include displacement vector in force diagram o Not generally included in force diagrams Considerations in Work o Vector dot products How much are the two vectors pointing in either direction o Force and displacement in terms of a right triangle to utilize trig Which direction the force and displacement are going to ensure nice angles to work with Ramp angle must be 4 5 degrees Spring scale built into capstone Work done on a cart moving at constant velocity Mass of the cart 253 1g Mass of black steel bar 499 5 g Hypotenuse of angle 120 6 cm Rise Angle 10 3 arcsin arcsin 4 88 10 3 120 6 Dependent Variable Mass of the cart mass of the steel and length of the string Independent Variable Angle of the track angle of the string displacement and force applied to the string Work Done on a Cart Moving Up the Ramp at Constant Velocity Graph Rhodes Lubin Oliveria 2 0 5 0 44 0 44 0 5 0 996 0 219 Work Done on a Cart Moving Down the Ramp at Constant Velocity Graph Rhodes Lubin Oliveria 3 0 5 0 07 0 07 0 5 0 996 0 035 Work Done on the cart moving upwards with a spring scale inclines at 60 degrees to the track Rhodes Lubin Oliveria 4 Work Done By you on the cart moving downwards with a spring scale inclines at 60 degrees to the track 0 5 0 02 0 02 0 5 0 996 0 009964 Rhodes Lubin Oliveria 5 0 5 0 04 0 04 0 5 0 996 0 01993 The magnitude of the work done by our arm onto the system decrease by a relative factor of 10 when the angle of the sensor was changed to 60 degrees Because the direction changes when the cart was moved upwards versus downwards the sign of the force value will flip given our assigned coordinate plane Keeping in mind the velocity remains constant Free Body Diagrams for Upward Motion First is failed attempted but I tried hard on it so I m including it too Taylor and the Second is the successful attempt at calculating the forces Rhodes Lubin Oliveria 6 Rhodes Lubin Oliveria 7 Free Body Diagram of Upward Motion Rhodes Lubin Oliveria 8

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