Two stones are thrown into air with speeds 20 m/s, 40m/s respectively? What are accelerations possessed by the objects?

A particle moving in a straight line covers half the distance with speed of 3 m//s . The half of the distance is covered in two equal intervals with speed of 4.5 m//s and 7.5 m//s respectively. The average speed of the particle during this motion is :

A bullet comes out of the barrel of gun of length 2 meter with a speed of 20 m/s. The average acceleration of the bullet is ...... m//s^(2).

A plane mirror and an object has speeds of 5 m//s "and" 10 m//s respectively. If the motion of mirror and object is along the normlal of the mirror then the speed of image may be:-

Two cars a and B starts motion with a velocity of 10 m//s and 20 m//s respectively. Car a moves with a constant acceleration of 2.5 m//s^(2) and car B have constant acceleration of 0.5 m//s^(2) as shown in figure. Find when car A will over take car B. Dimension of car is negligible as compare to distance. Find the time after which car A over takes car B.

Two particles A and B are projected simultaneously in the directins shown in figure with velocities v_(A) = 20 m//s and v_(B) = 10 m//s respectively. They collide in air after 1/2 s. Find (a) the angle theta (b) the distance x.

Two stones are thrown up simultaneously from the edge of a cliff 240 m high with initial speed of 10 m//s and 40 m//s respectively . Which of the following graph best represents the time variation of relative position of the speed stone with respect to the first ? ( Assume stones do not rebound after hitting the groumd and neglect air resistance , take g = 10 m//s^(2)) ( The figure are schematic and not drawn to scale )

A stone is thrown horizontally with the velocity v_(x) = 15m//s . Determine the normal and tangential accelerations of the stone in I second after begins to move.

A rocket is moving in a gravity free space with a constant acceleration of 2 m//s^(2) along + x direction (see figure). The length of a chamber inside the rocket is 4 m . A ball is thrown from the left end of the chamber in + x direction with a speed of 0.3 m//s relative to the rocket . At the same time , another ball is thrown in + x direction with a speed of 0.2 m//s drom its right end relative to the rocket . The time in seconds when the two balls hit each other is

A body is moving with velocity 30 m//s towards east. After 10 s its velocity becomes 40 m//s towards north. The average acceleration of the body is.

Two cars start off a race with velocities 2m // s and 4m // s travel in straight line with uniform acceleration 2m//s^(2) and 1m//s^(2) respectively. What is the length of the path if they reach the final point at the same time ?