Advanced MathEasyEvaluating a falling-object model
Advanced Math practice question
The height h, in metres, of a stone t seconds after it is dropped from a 100-metre cliff is h(t) = 100 − 10t². What is h(3)?
Answer: 10
100 − 10(9) = 100 − 90 = 10.
Common wrong answers
- If you answered 70
- 70 uses 10 × 3 instead of 10 × 3².
- If you answered 90
- 90 is the distance fallen, not the height.
- If you answered 190
- 190 adds instead of subtracting.
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