Question

A cheetah running 18 m/s accelerates at a rate of 1 m/s2 for 5 sec. What is the final velocity of the cheetah? m/s

Answer 1

Given,

u=18m/s

a=1m/s^2

t=5s

v=?

From first equation of motion

v=u+at

v=18+(1*5)

v=18+5

v=23m/s

Answer 2

Answer:

23m/s

Explanation:

it is given that

initial velocity= 18 m/s

acceleration rate= 1m/sec2

time =  5 sec

final velocity = to be found

let us take

initial velocity as u

Initial Velocity is the velocity at time interval t = 0 and it is represented by u. It is the velocity at which the motion starts. They are four initial velocity formulas: (1) If time, acceleration and final velocity are provided, the initial velocity is articulated as.$u = v – at.$

acceleration as a

time as t

and final velocity as v

The final velocity of an object is equal to its initial velocity plus acceleration multiplied by the time it travelled, and can be given as: $v = u + aΔt.$ where, v = final velocity.

there are three equations of motions

the first equation of motion is

$v=u+at$

substituting the values of initial velocity, acceleration, time to find velocity

$v=u+at\\v = 18 + 1*5\\v= 18+5\\v= 23m/sec$

hence the final velocity is 23m/sec

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