Draw velocity-time graphs for the following situations

$(i)$ When body is moving with uniform velocity.

$(ii)$ When body is moving with variable velocity, but uniform acceleration.

$(iii)$ When body is moving with variable velocity, but uniform retardation.

$(iv)$ When body is moving with a variable velocity and variable acceleration.

Write true or false for the following statements

The motion in animals is called locomotion. Mechanics deals with the motion of non$-$living objects.

$(a)$ Define uniform circular motion.

$(b)$ Is the uniform circular motion an accelerated motion? Give reasons for your answer.

What determines the direction of motion of an object velocity or acceleration ?

$(a)$ When will you say a body is in

$(i)$ uniform motion $(ii)$ non$-$uniform motion ?

$(b)$ Show the path of an object when it is in uniform motion with the help of a graph.