Question

Can proofs of equations os motion be asked in exams in class 9?
For example those V = U + AT proofs

Answer 1

Answer:

Prove v = u + at

where u = initial velocity, v = final velocity, a = acceleration and t = time period

Explanation:

We know acceleration (a) = rate of change of velocity

=

timeinterval

changeinvelocity

=

timeperiod

finalvelocity−initialvelocity

=

t

v−u

∴a=

t

v−u

ora×t=v−u

or at = v - u or at + u = v

∴ v = u + at