Chapter 2 – Kinematics

A car starting from rest accelerates at the rate f through a distance s, then continues at constant speed for time t and then decelerates at the rate f/2 to come to rest. If the total distance traversed is 15 s, then A car starting from rest accelerates at the rate f through a distance [...]

Consider a rubber ball freely falling from a height h = 4.9 m onto a horizontal elastic plate. Assume that the duration of collision is negligible and the collision with the plate is totally elastic. Then the velocity as a function of time and the height as a function of time will be : All [...]

From a tower of height H, a particle is thrown vertically upwards with a speed u. The time taken by the particle, to hit the ground, is n times that taken by it to reach the highest point of its path. The relation between H, u and n is: a particle is thrown vertically upwards [...]

Two stones are thrown up simultaneously from the edge of a cliff 240 m high with initial speed of 10 m/s and 40 m/s respectively. Which of the following graph best represents the time variation of relative position of the second stone with respect to the first? (Assume stones do not rebound after hitting the [...]

All the graphs below are intended to represent the same motion. One of them does it incorrectly. Pick it up. All the graphs below are intended to represent the same motion. One of them does it incorrectly. Pick it up. September 9, 2020 Category: Chapter 2 - Kinematics , JEE Mains Physics 2002-2019 Solved Video [...]

A passenger train of length 60 m travels at a speed of 80 km/hr. Another freight train of length 120 m travels at a speed of 30 km/hr. The ratio of times taken by the passenger train to completely cross the freight train when: (1)they are moving in the same direction, and (ii) in the [...]

A particle is moving with speed v = b root x along positive x-axis. Calculate the speed of the particle at time t = τ (assume that the particle is at origin at t = 0) A particle is moving with speed v = b root x along positive x-axis. Calculate the speed of the [...]

A bullet of mass 20 g has an initial speed of 1 ms^−1, just before it starts penetrating a mud wall of thickness 20 cm. if the wall offers a mean resistance of 2.5 × 10^−2 N, the speed of the bullet after emerging from the other side of the wall is close to : [...]

A ball is thrown upward with an initial velocity V0​ from the surface of the earth. The motion of the ball is affected by a drag force equal to mγv2 (where m is mass of the ball, v is its instantaneous velocity and γ is a constant). Time taken by the ball to rise to [...]

The position of a particle as a function of time t, is given by x(t) = at + bt^2 − ct^3 where a, b and c are constants. When the particle attains zero acceleration, then its velocity will be b and c are constants. When the particle attains zero acceleration is given by x(t) = [...]