Advanced level 2024 CASPA mock physics 3
Advanced level 2024 CASPA mock physics 3
In this experiment, you will be verifying the principle of moments. You will be using the following material: Two disposable plastic
cups with string handles, one 70 cm long piece of twine, one 40 cm long piece of twine, a metre rule, a rigid wooden bar (about one
metre long), a tall stand with clamps and a set of masses
Instructions
1. At one end of the 70 cm long string, make a loop through which the wooden bar can pass freely.
2. Tie the other end of the string to the clamp, up the stand.
3. Pass the wooden bar through the loop and suspend it roughly from its midpoint (O). Keep the bar horizontal with your hand.
4. Put a large known mass (M) of about 100 g in one plastic cup (A) and a smaller known mass in the other plastic cup (B).
5. Suspend A from the bar using its handle, so that it hangs freely on it, at a distance of about 35 cm from O.
6. Measure and record the horizontal distance đť‘Ą between O and A.
𝑥 = ………………… (1 mark)
7. Suspend B from the bar on the other side of O and keep on adjusting its position until the bar becomes horizontal again and
remains so.
8. Measure and record the horizontal distance đť‘™ between O and B and the corresponding mass đť‘š in B.
𝑙 = ………………… (1 mark)
𝑚 = ………………… (1 mark)
9. Increase the mass đť‘š in B and keep on adjusting its position until the bar is again horizontal and repeat steps (7) and (8) to
obtain other values of đť‘š and đť‘™.
10. Table of Data
