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

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

Relative speed of two persons moving with u m/s and vm/s in opposite direction where u>v

Relative speed of two bodies moving in same direction with speed u and v m/s: where (u>v)

Relative speed of two bodies moving in opposite direction with speed u and m/s .

Two ball A and B having masses 1kg and 2kg, moving with speeds 21m//s amd 4m//s repectively in opposite direction, collide head on. After collision A moves with a speed of 1m//s in the same direction, then correct statements is:

Two balls A and B having masses 1 kg and 2 kg, moving with speeds 21 m/s and 4 m/s respectively in opposite direction, collide head on. After collision A moves with a speed of 1 m/s in the same direction, then the coefficient of restitution is

A particle of mass m moving with velocity u_(1) collide elastically with another particle of same mass moving with velocity u_(2) in the same direction. After collision their speeds are v_(1) and v_(2) respectively then (A) u_(1)+v_(1)=v_(2)+u_(2) , (B) u_(1)-v_(1)=v_(2)+u_(2)

If two trains of length a metres and n metres are moving in the same direction at u m/s and vm/s: then time taken by faster train to cross the slower train.

Person A observes B moving in east direction with speed 10(m)/(s) , B observes C moving in south direction with speed 20(m)/(s) , C observes D moving in west direction with speed 30(m)/(s) & D observes a tree moving with speed 40(m)/(s) in north direction. Then the actual direction of motion of person A will be

The distance between two trucks moving towards each other is decreasing at the rate of 10m/s. If these trucks travel with same speeds in same direction the separation increases at the rate of 5m/s. The speeds of the trucks are :