Question

How do you get to know which equation of motion to use for problems?
Any ideas or tricks or ways by which we can get to know?
Help!

Answer 1

there are total three equations

1) v= u+ at

this is a problem which arises with many of us.

this is used where u are given all three except v , most of the times it's used for this but is also used for finding u or t or a.

for eg

v= 15km/h

t= 12sec

and a = 5cm^2

so first change the units then put this formula .

now 2) s=it+1/2at^2

so it's used for finding distance(s) when u r given time ( it's speciality)

3) v^2=u^2-2as

for finding s when time is not given .

when u will practice u will definitely seek it .

hope it helps uh