Physics Paper 2 required practicals

Physics Paper 2 required practicals

1. Stretching a spring (RP 6)

   • Equipment
     • Clamp stand
     • 2X Clamps
     • 2X Bosses
     • Spring
     • Meter rule
   • Setup clamp stand
     • Attach meter rule and spring (vertically)
       • Attach wooden splint as a pointer (bottom of spring, horizontal)
         • Read position of spring (unstretched length)
           • Continue to add 1 newton weights to spring and record length of spring
             • Work out extension produced by adding each weight
               • Subtract length of unstretched from each reading
               • Plot extension agaisnt weight
                 • Find weight of mystery object
                   • Measure extension of the spring when object is hanging on it
                     • Read weight of object from graph
       • Top of spring = 0
   • work out the weight of a mystery object
   • The graph is a straight line
     • Tells us that extension is directly proportional to weight
       • Linear
     • Spring constant is found by dividing force by extension
   • If non-linear then...
     • Too much weight
       • Overstretched
     • Inelastic deformation
   • Spring = elastic
     • If weight is removed the spring returns to its original length

2. Wave speed (P7)

   • Equipment
     • Toy car
     • Spring
     • pulley
     • 1N weight
     • Timer
     • Meter rule
   • Draw chalk lines evenly spaced out (10cm)
     • Attach toy car to spring, spring to pully and pulley to weight
       • Hold car at staring point
         • Let go of car and begin timer
           • The resultant force on spring (weight) makes the car accelerate
           • Record the time that the car passes each distance marker
             • Repeat the experiment several times, decreasing the weight
             • Acceleration of the car should be proportional to the weight of the end of the spring
               • a (acceleration) = Δv / Δt
                 • Δv is the change in velocity, and Δt is the amount of time it took for that change to occur.

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