Question

What is meant by acceleration ?Drive the relation S=ut+1\2 at square

Answer 1

Answer:

Acceleration:When speed changes with respect to time it is known as acceleration.

Explanation:

Hope it helped

Answer 2

Answer:

Acceleration is the rate of change of velocity.

Explanation:

Consider the linear motion of a body with an initial velocity u. Let the body accelerate uniformly and acquire a final velocity v after time t. The velocity–time graph is a straight line AB as shown below.

 

At t = 0, initial velocity = u = OA  

At t = t, final velocity = v = OC

The distance S travelled in time t = area of the trapezium OABD

s = (1/2) x (OA + DB) × OD

s = (1/2) x (u + v) × t  

Since v = u + at,

s = (1/2) x (u + u + at) × t

s = ut + (1/2) at2