An ant is moving through a graph paper along x-axis.A boy observes that the ant covers `1mm` in every second. What type of motion is this?

The distance travelled in 't' second s by an object starting with a speed of u metres/second and moving along a straight line with speed Increasing at the rates of a metres/second every second is given by ut+1/2 at^2 metres. An object moving in this manner travels 10 metres in 2 seconds and 28 metres in 4 seconds with what speed did it start? At what rate close its speed change?

The position of an object moving along x-axis is given by x=a+tb^2 where a - 8.5 m, b=2.5ms^-2 and t is measured in seconds. What is its velocity at t = 0 s and t = 2.0 s? What is the average velocity between t = 2.Os and t = 4.0 s ?

A graph paper is situated on a board as shown in figure. Near the graph paper a spring is placed. A pencil attached to the end of the spring as shown in figure. The pencil is free to move on the graph paper. A stone of mass 50g m is placed 1 m above the spring. [Spring constant k= 98N/m ]. What will happen to the length of mark if spring having smaller spring constant is used? Justify.