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PIMSO 2025 - Science - Primary 6 - National Round Question 17

PIMSO Science · PIMSO 2025 - Science - Primary 6 - National Round

Question 17

Jack wanted to find out which rod P or Q be more suitable to hang heavy weight. He clamped rod P on a clamp stand and hang a 15-kg weight on it as shown below. He repeated the experiment by replacing rod P with rod Q. He observed that rod Q broke but not rod P. Based on the information above, which one of the following statements is correct?

Question illustration

Editorial correction: read the stem’s 15 kg as 25 kg, matching the figure and choices. Compare equal-sized rods under identical clamping and loading.
  1. P is stronger as it could withstand weight of up to 25kg.
  2. Rod Q is stronger as it could withstand weight of more than 25kg.
  3. Rod P is more flexible as it withstands weights of up to 25kg.
  4. Rod Q is more flexible as it could withstand weighs of more than 25kg.