A super-bouncy-ball with a mass of 0.5 kg is thrown at a wall with a velocity of 5 m/s and it bounces back with a velocity of -5 m/s. A no-bounce-ball of the same mass is thrown at a wall at the same
velocity and does not bounce back at all. Which ball experiences a greater change in momentum?
O A the super-bouncy-ball
the no-bounce-ball
o they would have the same change in momentum

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