Lab 8 Report - Work and Energy Objective We are...

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Work and Energy Objective We are experimenting with kinetic and potential energy and relating these to work. This is being accomplished using a cart rolling across a track that is either level or elevated. Exercise 1: Getting a Handle on Work To measure the net work on the system, we first elevate the ramp using a wooden block placed beneath the ramp to an angle of 4.73°. Then we attach a spring scale to tow the ramp up the slope at a constant speed with both an angle of 0° to 60° relative to the ramp. We take the readings from the spring scale to determine the work done by the towing, and also calculate the work done by gravity and the work due to the normal force. These calculations are shown below. Calculations: J m N d F W Spring Spring Spring 3675 . ) 0 cos( 5 . 735 . ) cos( = = = φ ) 90 cos( ) 90 cos( ) 90 cos( α α α + + = + = d mg d F W Gravity Gravity J m s m kg 4045 . ) 73 . 4 90 cos( 5 . ) 73 . 4 90 cos( 81 . 9 002 . 1 2 - = + + = J d F W Normal Normal 0 ) 90 cos( = = Data: The following is the recorded and calculated data from exercise 1: Exercise 1 F
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