*Please note: data is not neccessary to answer blue box questions. Thanks Hi, Pl

Question

*Please note: data is not neccessary to answer blue box questions. Thanks

Hi,

Please read lab thoroughly and answer questions in blue boxes. (PLEASE focus on question 1.3 I have no idea what some source of errors could be in this lab)

**is 1.1 and 1.4 asking basically the same question? (Kinetic becomes potential & vice versa?)

Thank you!

UNIVERSITY OF CALIFORNIA, SANTA BARBARA Energy Transformation Gaining Intuition In this lab you will be investigating different forms of energy and how they are transformed from one Energy and work are linked by the Work-Energy Theorem. Simply stated, the work done change in the kinetic energy of the particle. The energy of motion is called kinetic energy (KE).Work is that is stored in the position of a physical system is called potential energy (PE). This is energy that can do work kind to another on a particle is always equal to the being done. Energy Loading a stone into a sling shot requires you to do work by stretching the elastic band. At this point the work has been stored as potential energy in the clastic band. When you release the system the stone (which has mass) is accelerated from rest to some final speed as the elastic band breaks contact with the stone. Now the potential (stored) energy has been transformed to kinetic energy. The maximum energy the ball can have is the potential energy stored in the clastic band provided by the operator of the sling shot. One of the fundamental laws of nature is the Law of Conservation of Energy This law states that (in the abscence of PE +KE Total energy The total energy in a closed system remains constant. dissipation), In the case of our sling shot,after pulling the mass back, the total energy is completely potential energy,the kinetic energy is zero because the mass is not yet moving, Next, vision the release in slow-mo. The elastic starts to push on the mass. The mass now has speed and hence kinetic energy Question 1.1 Where did the kinetic energy come from? Notice as the kinetic energy starts to increase the potential energy decreases by the same amount. The sum of the two energies must total the starting energy in this case the potential energy stored in the elastic band. Procedure 1) Fire up the air-track. Set the knob to 3. Check the level of the track as you did in the previous lab. 2) Attach the Ranger to the calculator.See Appendix A for operating instructions for the sonic ranger 3) Place a small riser block under the single stand-alone leg of the air track. Measure the height, b, of the block and record this in your lab book.Also, measure and record the mass of your glider cart. 4) Start the glider (with attached metal reflector) at the bottom of the track and give it a quick push up the ramp (air- track), Do not push the glider-cart all the way up the ramp because the rangefinder has trouble measuring objects within S0cm of its sensor. Use the rangefinder to measure the position and speed of the cart as a function of time.

Explanation / Answer

1.1 The total energy of the system is always conserved i.e. constant.The potential energy of the elastic band get converted into the kinetic energy of the mass.

So the kinetic energy comes at the cost of potential energy.

1.2 The energy may not be conserved due to some losses which delemds on your experimental setup

1.3 the error may be due to the following reasons

1.4 Yes,as you said its the same conversion of kinetic energy into potential and vice versa.

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