Standard Science Primary 4 Energy

Two different metal strips, P and Q, are joined together. When heated, strip P expands more than strip Q. In which direction will the combined strip bend?

A It will bend towards strip Q.
B It will bend towards strip P.
C It will snap into two pieces.
D It will remain straight.
Show Worked Solution

Worked Solution

Step 1: Strip P becomes longer than Q. Step 2: To accommodate the extra length while remaining joined, the longer strip must be on the outer curve. Step 3: This causes the strip to bend towards the shorter side (Q).

Correct answer: It will bend towards strip Q.

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