Acar moving at a velocity of 20 m/s (at t = 0 sec) acquires a velocity of 40m/s. if the acceleration of the car is 4 m/s2, calculate (i) time taken by the car to acquire the velocity of 40m/sec. (ii) distance travelled by the car for attaining the velocity of 40m/sec.

there are no correct statementd on the list of choices you provided.

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s