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I need help with the questions for Force Graphs and the questions for The Robot Moving Company on the physics lab.

PHY213 Physics I PHY213 Online Lab 03 Lab 03: Forces and Motion Whoa! Thats long way down PURPOSE In this experiment we will investigate the action of Forces and the resulting motion. THEORY Scalars are quantities that have only magnitude. Vectors are quantities that possess both magnitude and direction. Vectors, must be treated with direction in mind. Forces are vectors. Two or more vectors in the same or opposite direction may be added algebraically as though they were scalars. The vector sum of A, B, and C is the resultant R. The magnitude of the resultant in this case is R A+B-C. (See figure below) With regards to forces, Newton had three laws of motion An object at rest will remain at rest, or an object in motion will remain in straight- line constant velocity motion, unless acted on by a net force 2. A net force given to an object will be equal to its mass times its acceleration. 3. For every action (force) there is an equal and opposite reaction (a force in the opposite direction) Friction is a force, and it is is equal to the coefficient of friction, μ, times the normal force, N For a flat plane, the normal force is equal to the weight of the object. In general, the static (or stationary) coefficient of friction, us, is greater than the kinetic (or moving) coefficient of friction, μk, Hence it takes more force to get something moving, than to keep it moving. OBJECTIVES In this experiment, you will .1. Investigate Newtons laws of motion regarding forces. . 2. Investigate the force of Friction. Page 1

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PHY213 Online Lab 03 FORCE GRAPHS Acceleration Velocity Fostion 1. Click on the Force Graphs tab. Select Ice (no friction) and Bouncy. Click the + sign for Acceleration, Velocity, and Position. Those graphs should now be shown. Give the FApplied a value of 1000: look like Your initial screen should 2. button. Describe what happens to the acceleration, velocity, and Hit the play position, when you apply this constant force 3. Do a screen save of your run, and paste it here (Note: On many computers this is achieved by holding the ALT key and hitting the PrtScn (or PrintScreen) button. Now paste your screen save in the space below. This can done by first clicking into the space below. Now hold the CTRL key and hit V.) Page 5

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