A train ball is dropped from the roof of a building. An observer standing in front of a window `1.2m` high notes that the ball takes `1/8 s` to fall from the top to the bottom of the window. The ball continues to fall , makes a completely elastic collision with a horizontal sidewalk and reappears at the bottom of the window 2 s after passing in on the way down. How tall is the building ?

A steel ball is dropped from the roof of a building.An observer standing in front of a window 1.2 m high notes that the ball takes 1/8 s to fall from the top to the bottom of the window.The ball continues to fall, makes a completely elastic collision with a horizontal sidewalk and reappears at the bottom of the window 2 s after passing it on the way down. How tall is the building ?

A steel ball is dropped from the roof of a building .An observer standing in front of a window 1.25 m high notes that the ball takes 1/8 s to fall from the top to the bottom of the window .The ball reappears at the bottom of the window 2s after passing it on the way down,if the collision between the ball reappears at the bottom of the window 2s after passing it on the way down.If the collision between the ball and the ground is perfectly elastic,then find the height of the building?Take g=10 m//s^(2) .

A steel ball is dropped from th roof of a building. A man standing in front of a 1-m high window in the building notes tha the ball takes 0.1 s to the fall from the top to the boottom of the window. The ball continues to fall and strikes the ground. On striking the ground, the ball gers rebounded with the same speed with which it hits the ground. If the ball reappears at the bottom of the window 2 s after passing the bottom of the window on the way down, dind the height of the building.

A steel ball is dropped from th roof of a building. A man standing in front of a 1-m high window in the building notes tha the ball takes 0.1 s to the fall from the top to the boottom of the window. The ball continues to fall and strikes the ground. On striking the ground, the ball gers rebounded with the same speed with which it hits the ground. If the ball reappears at the bottom of the window 2 s after passing the bottom of the window on the way down, dind the height of the building.

A ball is dropped from the top of a building of height 80 m. At same instant another ball is thrown upwards with speed 50 m/s from the bottom of the building. The time at which balls will meet is

A ball is dropped from the top of a building of height 80 m. At same instant another ball is thrown upwards with speed 50 m/s from the bottom of the building. The time at which balls will meet is