Help plz any one 1. In each of the following questions find the density. State the units of your answer.
Mass 45g, volume 5cm3

Hello There!!

Explanation:

Densitiy=mass÷volume

Density= 45÷3

Density=15cm

hope this helps,have a great day!!

~Pinky~

f=ma newton

f=100x2.5=250n

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