Atoy car with a mass of 2.5 kg travels at a velocity of 37 m/s for 2.5 s until it is stopped by a wall. what was the average acceleration of the toy car? a. 14.8 m/s b. 0.07 m/s² c. 14.8 m/s² d. 0.07 m/s

that would be because of both gravity and friction. so     c

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