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YEAR 11 PHYSICS
MOVEMENT: DATA ANALYSIS TEST 2000 ed
Total 36
Name: ____________________________________
One method of measuring movement that is commonly used in the laboratory is multipleexposure photographs.
A camera is set up with it's shutter open. A stroboscope (bright light) is set to flash at
regular intervals and the object is made to move within the view of the camera. Each time
the light flashes, the image of the object is recorded, so we get many images on one print.
The diagram below shows how the equipment is arranged.
The photograph below shows the photographic print produced when a steel ball rolls
down a slope which is inclined at 10o to the horizontal. The top of the slope is smooth,
but the bottom part is sticky with paint.
Note: The light flashed every 0.2 seconds.
The photograph is one tenth of the actual size.
Multiple flash photograph of
a ball rolling down a slope
1. Use the multiflash photograph to complete the results table below:
Interval
time (s)
displacement (m)
0
1
2
3
4
5
6
7
8
9
10
11
12
13
0.0
0.0
(10 marks)
final velocity for
that interval (m s-1)
0.0
2.
Using your results table to plot a graph (on the graph paper supplied) of final
velocity for each interval, against time, for the steel ball.
Note: You can use your graphics calculator if you wish. If you use your
calculator, still sketch the general shape of the graph showing key points on the
axis
(5 marks)
3.
How long after the ball started to roll did it take for it to reach the sticky paint?
(1 mark)
4.
Explain your answer to Q3.
(2 marks)
5.
At the edge of the photo, the ball is still moving. ESTIMATE how much more
time elapses before the ball stops
(2 marks)
6.
Calculate the average velocity of the ball over the whole section of the photo
(2 marks)
7.
Calculate the average acceleration of the ball down the ramp before it enters the
sticky paint section.
(3 marks)
8.
Calculate the average acceleration of the ball from the time it enters the sticky
paint section until it stops.
(3 marks)
9.
Calculate the theoretical acceleration of the ball down the slope (before it enters
the sticky paint) if the slope was frictionless.
(3 marks)
10.
Calculate the average frictional force opposing the motion of the ball down the
slope.
(5 marks)