Motion in a Str...

A stone dropped from the top of the tower touches the ground in 4 sec. The height of the tower is about

Two balls are dropped to the ground from different heights. One ball is dropped 2 s after the other but they both strike the ground at the same time. If the first ball takes 5 s to reach the ground, then the difference in initial height is (g = 10 ms^–2)

A frictionless wire AB id fixed on a sphere of radius R. A very small spherical ball slips on this wire. The time taken by this ball to slip from A to B is

From a balloon rising vertically upwards at 5 m/s a stone is thrown up at 10 m/s relative to the balloon. Its velocity with respect to ground after 2 s is

A stone thrown upward with a speed u fro the top of the tower reaches the ground with a velocity 3u. The height of the tower is

A ball is thrown vertically upwards with a velocity of 25 ms^–1 from the top of a tower of height 30 m. How long will it travel before it hits ground?

An object start sliding on a frictionless inclined plane and from same height another object start falling freely

From the top of a tower stones, whose masses are in the ratio 1 : 2 are thrown one straight up with an initial speed u and the second straight down with the same speed u. Then, neglecting air resistance

Three particles A, B and C are thrown from the top of a tower with the same speed. A is thrown up, B is thrown down and C is horizontally. They hit the ground with speeds V_A, V_B and V_C respectively

A ball is thrown vertically upwards from the top of a tower at 4.9 ms^–1. It strikes the pond near the base of the tower after 3 sec. The height of the tower is