A cannon after firing recoils due to
(1) greater than velocity of body A
(2) greater than velocity of body B
(3) less than the velocity of body A
(4) less than the velocity of body B

Solution
All options are correct :
(i) When two bodies A & B move in opposite directions then relative velocity between A & B either v_{AB} or v_{BA} both are greater than v_{A} & v_{B}.
(ii) When two bodies A & B move in parallel direction
then v_{AB}= v_{A}–v_{B} ⇒ v_{AB} < v_{A}
v_{BA}=v_{B}–v_{A} ⇒ v_{BA} < v_{B}
A man getting down a running bus, falls forward because
A parrot is sitting on the floor of a closed glass cage which is in a boy’s hand. If the parrot starts flying with a constant speed, the boy will feel the weight of the cage as
When a body is stationary
Which of the following are examples of uniform velocity?
A vector quantity is a physical quantity which needs
The numerical ratio of average velocity to average speed is

Solution
It is equal to or less than one.