A 1.2 kg skateboard is coasting along the sidewalk at a speed of 5.0 m/s when a 800 g. cat jumps down from a tree(no horizontal motion) onto the skateboard. What is the speed of the cat after the collision? a 3.2 m/s
b 0.3 m/s
c .03 m/s
d 3.0 m/s

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

i think it would be 5

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000