What is the speed of a train if it overtakes two persons who are walking in the same direction at the rate of `a\ m//s` and `(a+1)` m/s and passes them completely in `b` seconds and `(b+1)` seconds respectively? `(a+b)m//s` b. `(a+b+1)m//s` c. `(2a+1)m//s` d. `((2a+1))/2m//s`

Relative speed of two persons moving with u m/s and m/s in same direction where u>V

A train overtakes a person walking at 1 m/s in 5 s. If the speed of the train is 65 m/s, then what is the length of the train?

A train 100m long travelling at 40 m/s starts overtaking another train 200 m long travelling at 30m/s in the same direction. The time taken by the first train to pass the second train completely is :

A train 75 m long overtook a person who was walking at the rate of 6 km/ hr in the same direction and passed him in 7 1/2 seconds. Subsequently, it overtook a second person and passed him in 6 3/4 seconds. At what rate was the second person travelling? 1 k m//h r b. 2 k m//h r c. 5 k m//h r d. 4 k m//h r

Two particles A and B start moving simultaneously along the line joining them in the same direction with acceleration of 1 m//s^2 and 2 m//s^2 and speeds 3 m//s and 1 m//s respectively. Initially, A is 10 m behind B. What is the minimum distance between them?

A particle is moving along a circle of radius 1 m at a speed of 2 m/s .If the speed is incresed at the rate of 3 m//s^(2) then the resultant acceleration is

A person A is sitting in one train while another person B is in the second train. The trains are moving with velocities 60 m//s and 40 m//s , respectively, in the same direction. Then the velocity of B relative to A will be.

A lamp of negligible height is placed on the ground l_1 away from a wall. A man l_2m tall is walking at a speed of (l_1)/(10)m//s from the lamp to the nearest point on the wall. When he is midway between the lamp and the wall, the rate of change in the length of this shadow on the wall is -(5l_2)/2m//s (b) -(2l_2)/5m//s -(l_2)/2m//s (d) -(l_2)/5m//s