Question

Define acceleration uniform acceleration and instantaneous acceleration

Answer 1

Answer:

acceleration = the rate of doing work

uniform acceleration =the rate of doing work in a particular direction in equal intervals of time

Answer 2

$\Large{\underline{\underline{\bf{Solution :}}}}$

★ Acceleration :

(i) It is defined as the rate of change of velocity.

(ii) It is a vector quantity.

(iii) Its direction is same as that of change in velocity and not of the velocity (That is why acceleration in circular motion is towards the centre)

(iv) There are three ways possible in which change in velocity may occur

$\rule{150}{2}$

★ Uniform acceleration :

A body is said to have uniform acceleration if magnitude and direction of the acceleration remains constant during particle motion.

Note : If a particle is moving with uniform acceleration, this does not necessarily imply that particle is moving in straight line.

Example : Parabolic motion

$\rule{150}{2}$

★ Non-uniform acceleration :

A body is said to have non-uniform acceleration, if magnitude or direction or both change during motion.