Question

Which one is true (a) v = u - at (b) v - u =at (c) v = at - u (d) u - v = at

Answer 1

Answer:

b

Explanation:

because final velocity minus initial velocity by time gives acceleration.

Answer 2

QUESTION :-

Which one is true?

(a) v = u - at

(b) v - u =at

(c) v = at - u

(d) u - v = at

Answer :-

(b) v - u = at

Derivation :-

Consider the graph attached below:

• The linear motion of a body with initial velocity:- u

• The body accelerates uniformly with:- a

•  Time:- t

• The body acquires a final velocity:- v

The velocity-time graph is a straight line DB.

→ Initial velocity = OD = u

→ Final Velocity = OC = v

→ Acceleration = Slope of line DB,

→ Acceleration (a)

→ a = AB / AD 

→ a = DC / OE             (AB = DC & AD = OE)

→ a = (OC-OD) / OE

→ a = (v-u) / t

→ at = v-u

→ v = u + at