Physics Circle home Student Login

Home›Chapters›Laws of Motion PYQs›Circular Motion (Related PYQs)›Question 9

NEET 2008 (AIPMT) · Circular Motion (Related PYQs)

Circular Motion (Related PYQs) question from NEET 2008 (AIPMT)

Q9NEET 2008 · AIPMTMedium

Circular Motion (Related PYQs)

A roller coaster is designed such that riders experience ''weightlessness'' as they go round the top of a hill whose radius of curvature is 20 m. The speed of the car at the top of the hill is between

Show answer and solution

Answer: (c)

  1. Weightlessness at the top: normal force is zero, so mg=mv2Rmg = \frac{mv^2}{R}.
  2. v=gR=9.8×20=14v = \sqrt{gR} = \sqrt{9.8 \times 20} = 14 m/s (with g=10g = 10: 200≈14.1\sqrt{200} \approx 14.1 m/s)
  3. So the speed lies between 14 m/s and 15 m/s, answer (c).
Report a mistake

More questions on Circular Motion (Related PYQs)