State the formula of retardation.

A body starts from rest is accelerated uniformly for 30s. If x1, x2, x3 are the distances travelled in first 10s; next 10s and last 10s respectively, then x1 : x2 : x3 is

In the above graph what is the value of acceleration? 

What do you mean by $5 \mathrm{m} {\mathrm{s}}^{-2}$?

State which of the following situations are possible and give an example for each of these:

An object with a constant acceleration but with zero velocity.

State whether the following situation is possible or not and give an example for the case.

An object with a constant acceleration but with zero velocity.

An object is thrown vertically upwards and rises to a height of $20 \mathrm{m}$. Calculate the velocity with which the object was thrown upwards. ($g=10 \raisebox{1ex}{$\mathrm{m}$}\!\left/ \!\raisebox{-1ex}{${\mathrm{s}}^2$}\right.$).

Can be a body be accelerated, if it is moving with constant speed?

Define acceleration.

The direction of acceleration is same as that of _____.

(force/torque)

What is the SI unit of acceleration?

Give an example of each.

(i) acceleration is in the direction of motion.

(ii) acceleration is against the direction of motion.

(iii) acceleration is uniform.

(iv) acceleration is non-uniform.

Equations of motion are used for uniformly accelerated motion only. Comment​