A ball is thrown vertically upwards with a speed of 10m/sec from the top of a tower 200m high and another is thrown vertically downwards with the same speed simultaneously. The time difference between them in reaching the ground, in seconds, if g is taken as 10 m/s², is:

A body is projected vertically upwards at time t = 0 and it is seen at a height \'H\' at time t₁ and t₂ seconds during its flight. The maximum height attained is : (g is acceleration due to gravity)

The displacement of a particle moving in a straight line is given by x = 2t²+t+5 where x is expressed in meter and 't' in second.The acceleration at t = 2sec is

A stone is projected in air. Its time of flight is 3s and the range is 150m. Maximum height reached by the stone is: (g = 10 ms^-2)

A body is thrown horizontally from the top of a tower of 5 m height. It touches the ground at a distance of 10m from the foot of the tower. The initial velocity of the body is: (g = 10ms^-2)

A car travels the first half of a distance between two places a speed of 30 km/hr and the second half of the distance a 50km/hr. The average speed of the car for the whole journey is

A particle is projected from the ground with an initial velocity of 20ms^-1 at an angle of 30⁰ with horizontal. The magnitude of change in velocity in 0.5 seconds is(g=10ms^-1)

A juggler maintains four balls on motion, making each inturn rise to a height 20m from his hand. Where will the other three balls be at the instant when the fourth one is just leaving the hand?

A body is thrown vertically upward with an initial velocity u reaches maximum height in 6 sec.The ratio of distance travelled by the body in the first and seventh second is :

A bomb is dropped from an aircraft travelling horizontally at 150m/s at a height of 490m. The horizontal distance travelled by the bomb before it hits the ground is (in metre):