A bullet is fired vertically up from a 400 m tall tower with a speed 80 m/s. If g is taken as `10 m//s^(2),` the time taken by the bullet to reach the ground will be

A bullet is fired vertically upwards. After 10 seconds it returnsto the point of firing. If g = 10 m//s^(2) , the position of the bullet after 7 seconds from the time of firing will be the same as that after time

A bullet is fired from a rifle with velocity of 750 m/s. If the length of the rifle barrel is 60 cm. Calculate time taken by the bullet to travel in the barrel

A ball is thrown horizontally with a speed of 20 m//s from the top of a tower of height 100m Time taken by the ball to strike the ground is

A particle of mass 2m is dropped from a height 80 m above the ground. At the same time another particle of mass m is thrown vertically upwards from the ground with a speed of 40 m/s. If they collide head-on completely inelastically, the time taken for the combined mass to reach the ground, in units of second is:

A particle of mass 2m is dropped from a height 80 m above the ground. At the same time another particle of mass m is thrown vertically upwards from the ground with a speed of 40 m/s. If they collide head-on completely inelastically, the time taken for the combined mass to reach the ground, in units of second is:

A body is dropped from the top of a tower. If its average velcoity when it reaches the ground, is 10 ms^(-1) and the time taken by it to reach the ground is 2s, the height of the tower is ______ m.