Calculations Calculate the acceleration of the trolley using the formula
Tabulation of Data Table 2.5
u / ms1 v / ms1
1 2 3
Precautions Repeat the process a number of times and find an average for the acceleration. Increasing the distance (s) will increase the change in velocity; this will reduce the percentage error. Take care to avoid parallax error when using the metre stick.
s / m 2s u2 v2 a / m s2
a u2 v2 2s
.
MANDATORY EXPERIMENT 1 (PART A)
Measurement of Velocity Method 2: Using ticker tape and timer Apparatus Ticker tape, ticker timer, trolley, sloped runway, metre stick
Procedure Attach one end of ticker tape to trolley. Place other end through ticker timer and push trolley.
Adjust the slope of the runway so that the distance between dots on the ticker tape is constant.
t n f
Ticker tape Fig 2.24
Measure the distance (s) between a set number of dots on the tape with a metre stick. Calculations
Calculate the time taken (t) by dividing the number of spaces (n) between the dots by the oscillating frequency (f )6 of timer,
. Calculate the velocity of the trolley using the formula
v s t
. Runway To 12 V 50 Hz a.c. supply Ticker timer Trolley
6 Mains electricity operates at 50 Hz, which means f 50.
