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JEE Main essentials — original practice

Original warm-up practice in mechanics, chemistry, and calculus for JEE Main Paper 1.

3 flashcards · Curadoria: Ada

Pergunta 1: A car speeds up uniformly from 5.0 m/s to 15.0 m/s in 4.0 s. What is its acceleration?

2.5 m/s²

Acceleration is the change in velocity divided by the time interval: (15.0 - 5.0) m/s divided by 4.0 s equals 2.5 m/s².

2.0 mol

Divide the mass by the molar mass: n = 36 g / 18 g/mol = 2.0 mol.

The derivative is f′(x) = 3x² - 3. Substituting x = 2 gives 12 - 3 = 9.