If 127.8 j of heat is added to a 4.0 gram sample of iron metal and the temperature of the metal increases from 25°C to 97°C, what is the specific heat of iron? A: 0.0044 J/g°C
B: 0.044 J/g°C
C: 0.444 J/g°C
D: 4.4 J/g°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