Motion in a Str...

A car A is travelling on a straight level road with a uniform speed of 60 km/h. It is followed by another car B which is moving with a speed of 70 km/hr. When the distance between them is 2.5 km, the car B is given a deceleration of 20 km/hr². After how much time will B catch up with A

The speed of a body moving with uniform acceleration is u.This speed is doubled while covering a distance S. When it covers an additional distance S, its speed would become

Two trains one of length 100 m and another of length 125 m, are moving in mutually opposite directions along parallel lines, meet each other, each with speed 10 m/s. If their acceleration are 0.3 m/s² and 0.2 m/s² respectively, then the time they take to pass each other will be

A body starts from rest with uniform acceleration. If its velocity after n second is v, then its displacement in the last two seconds is

A point starts moving in a straight line with a certain acceleration. At a time t after beginning of motion the acceleration suddenly becomes retardation of the same value. The time in which the point returns to the initial point is

A particle is moving in a straight line and passes through a point Owith a velocity of 6 ms^–1. The particle moves with a constant retardation of 2 ms^–2 for 4 s and there after moves with constant velocity. How long after leaving O does the particle return to O

A bird flies for 4 s with a velocity of |t –2| m/s in astraight line, where t is time in seconds. It covers a distance of

A particle is projected with velocity v₀ along x–axis.Thedeceleration on the particle is proportional to the square of the distance from the origin i. e., a = –α x².The distance at which the particle stops is

A body is projected vertically up with a velocity v and after some time it returns to the point from which it was projected. The average velocity and average speed of the body for the total time of flight are

A stone is dropped from a height h.Simultaneously, another stone is thrown up from the ground which reaches a height 4 h. The two stones cross each other after time