[-40m/sec^(2)],[" all is dropped from top of a building "100m" high.At the same instant,another ball is thrown upwards with "],[" ocity of "40ms^(-1)" from the bottom of the building.The two balls will meet after "],[[" Ss "," (2) "2s," () "]]

A ball is dropped from the top of a building 100 m high. At the same instant another ball is thrown upwards with a velocity of 40ms^(-1) from the bottom of the building. The two balls will meet after.

A ball is dropped from the top of a building 100 m high. At the same instant another ball is thrown upwards with a velocity of 40ms^(-1) from the bottom of the building. The two balls will meet after.

A ball is dropped from the top of a building 100 m high. At the same instant another ball is thrown upwards with a velocity of 40ms^(-1) form the bottom of the building. The two balls will meet after.

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

A ball is dropped from top of a tower 250 m high. At the same time, another ball is thrown upwards with a velocity of 50 ms^(-1) from the ground. The time at which they cross each other is

A ball is dropped from top of a tower 250 m high. At the same time, another ball is thrown upwards with a velocity of 50 ms^(-1) from the ground. The time at which they cross each other is

A ball A is dropped from the top of a tower 500m high and at the same instant another ball b is projected upwards with the velocity of 100m/s. after how much time and where the two balls will meet?

A ball is dropped from a top of a 100 m high building. At the ssame time another ball is thrown up from the ground with a speed of 20ms^(-1) . At what time will the balls meet?

A ball is thrown downwards with a speed of 20 m s^(-1) , from the top of a building 150 m high and simultaneously another ball is thrown vertically upwards with a speed of 30 m s^(-1) from the foot to the building . Find the time after which both the balls will meet. (g=10 m s^(-2)) .