Start Free Mock LoginAlready registered? Login here

Physics - Kinematics Question with Solution | TestHub

PhysicsKinematics1-DMedium2 minQB

PhysicsMediumsingle choice

A stone falls from rest. The total distance covered by it in the last second of its motion is equal to the distance covered in the first three seconds of its motion. The stone remains in the air for:

Options:

Answer:

Solution:

If it falls for $n$ seconds, the last second gives $s_{n} = \frac{g}{2} (2 n - 1)$ and the first three seconds give $\frac{g}{2} 3^{2} = \frac{9 g}{2}$ . Then $2 n - 1 = 9$ , so $n = 5$ s. Option B.

Stream:JEESubject:PhysicsTopic:KinematicsSubtopic:1-D

⏱ 2mℹ️ Source: QB

Doubts & Discussion

Loading discussions...