A motor car starts from rest and accelerates uniformly for $10 \mathrm{s}$ to a velocity of $30 \mathrm{m} {\mathrm{s}}^{-1}$. It then runs at a constant speed and is finally brought to rest in $80 \mathrm{m}$ with a constant retardation. Total distance covered is $830 \mathrm{m}$. Find the value of acceleration, retardation and total time taken.

In the above graph what is the value of acceleration? 

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?

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.

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

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.

The direction of acceleration is same as that of _____.

(force/torque)

Define acceleration.

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​

State whether the following situation is possible and give an example for it: An object with a constant acceleration but with zero velocity.

When do we say that a body is retarding or decelerating?