Physics Practical's Paper 2

Question 1

In 4 Steps how do You Calculate waves on water (PRATICAL)?

Answer 1

• 1) Place a ruler onto a piece of card underneath the tank and turn on the power supply.
• 2) Measure the distance of 10 consecutive waves.
• 3) Divide this number by 10 to calculate 1 wave length.
• 4) To calculate Frequency you would time how many waves pass a point a second.

Question 2

In 4 Steps How do you calculate waves in air (PRATICAL)?

Answer 2

• 1) measure the length of the spring at the second harmonic this will just be one wavelength.
• 2) set the frequency so just 1 wavelength is on the string.
• 3) Record the frequency and increases the frequency until 2 waves appear.
• 4) Repeat once more.

Question 3

In 4 Steps How do You Figure IR Absorption (PRATICAL)?

Answer 3

• 1) Fill the Leslie Cube with hot water.
• 2) Wait for 2 minutes.
• 3) Use an infrared thermometer to measure all 4 surface temperatures.
• 4) Results - 1) Matt black (Hottest)
• 2) Shiny black
• 3) White
• 4) Sliver (Coolest)

Question 4

In 4 Steps how do you investigate the relationship between force and extension of a spring (PRATICAL) ?

Answer 4

• 1) Fix the top of a Spring to a Clamp on a resort stand. Also Fix a ruler next to it, with the zero mark lined up with the bottom of the spring. (Subtract the original length of the spring from each measurement if measuring the total length each time).
• 2) For accurate measurement’s make sure the ruler is close to the spring and get eye level to reduce parallax errors.
• 3) Add Slotted Masses on a hanger to the spring to change the Force/tension.
• 4) Plot force against extension, which shows a directly Proportional Relationship.

Question 5

In 5 Steps How do You investigate the effect of varying the force on the acceleration (PRATICAL)?

Answer 5

• 1) Attract slotted masses to a Trolley on a Track or Gliders on a air track, so they hang over by a pulley.
• 2) Let trolley move due to weight of masses - Its flag will pass Through two Light/photogates Connected to a Datalogger, Which will calculate acceleration.
• 3) Alternative 1: Use Light gates to measure velocity (V), and measure the distance travelled with a Metre Ruler (S).
• 4) Change The force by removing masses from the hanger and placing them on a trolley. This is crucial, as the total mass being accelerated (Trolley + Masses) Must remain constant. .
• 5) Plot force against acceleration , which should show a directly proportional relationship (Linear thought origin).