Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET2026PhysicsChapterActual

Five identical coins are dropped from rest from different balconies of a tall building. The time taken by each coin to reach the ground is recorded as follows (neglecting air resistance): A. Coin A takes 3.0 s. B. Coin B takes 1.5 s. C. Coin C takes 2.5 s. D. Coin D takes 4.0 s. E. Coin E takes 2.0 s. What is the correct order of the heights of the balconies from which the coins were dropped?

Options

  1. AD > A > C > E > B
  2. BB > E > C > A > D
  3. CD > C > A > E > B
  4. DA > D > C > E > B

Correct answer

A. D > A > C > E > B

Step-by-step solution

For an object dropped from rest, the height h is given by h = 1 2 gt^2 . Since g is constant, h t^2 . Thus, the height of the balcony is directly proportional to the square of the time taken to reach the ground. A longer time corresponds to a greater height. The given times are: t_D = 4.0 s t_A = 3.0 s t_C = 2.5 s t_E = 2.0 s t_B = 1.5 s Arranging the times in descending order gives t_D > t_A > t_C > t_E > t_B . Therefore, the correct order of the heights is D > A > C > E > B . Answer: D > A > C > E > B

Practice Chapter on Quantrex Academy →

More from Chapter

A solid spherical body of radius R , density , and specific heat capacity s is initially at temperature T₀ . It is placed in a vacuum chamber at absolute zero and cools by emitting 2026A straight canal has motorboats departing from two terminals at opposite ends. The motorboats depart at regular intervals of T minutes in both directions and travel at a constant s 2026A wooden crate is released from rest at the top of a ramp inclined at 37^ to the horizontal. When the ramp is perfectly smooth, the crate reaches the bottom with a speed v . When t 2026A uniform horizontal beam of mass 6 kg and length L is hinged to a vertical wall at one end. The other end is supported by a light inextensible wire attached to the same wall, maki 2026A bullet P of mass 30 g moving with a speed of 200 m/s penetrates a target and comes to rest after travelling a distance of 10 cm inside it. Another bullet Q of mass 20 g moving wi 2026A small block of mass m is placed at the highest point of a smooth fixed sphere of radius R . It is given a horizontal initial speed v₁ such that it slides down the surface. The bl 2026A block of mass 2 kg is projected with an initial speed of 14 m/s on a rough horizontal surface. The coefficient of kinetic friction between the block and the surface is 0.2 . Afte 2026A uniform horizontal circular disc of mass M and radius R is rotating freely about a vertical axis passing through its center at an angular speed of 40 rpm . Two small blocks, each 2026 Full Chapter list All NEET PYQs