Question

when should we use 1 equation of motion
when should we use 2 equation of motion
when should we use 3 equation of motion
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Answer 1

Answer:

First equation of motion is used to find final velocity of the object---v=u+at

it can be used when u-initial velocity,a-acceleration ,and t-time is given.

Second equation of motion is used to find the distance---S=ut+1/2*at^2 it can be used when u(initial velocity),a(acceleration),and t(time) is given.

Third equation of motion--v^2=u^2+2aS is also used to find final velocity when acceleration,distance,and initial velocity is given.

But u can use these formulas to find acceleration,initial velocity,time,distance all formulas are eligible for that.

I hope u r helped by my answer.

Answer 2

Answer:

first of all.

All 3 equations are used when acceleration of body is constant

Explanation:

1 equation is v=u+at o

2 equation is s=ut+½at² .

3 equation is v²=u²+2as

(v=final velocity, u=initial velocity, a= acceleration and t=time and s=displacement).

Equations are used when any 3 quantities are given and asked for 4th.

May this help u