The centripetal force on an object in circular motion is a. perpendicular to the plane of the object’s motion. b. in the plane of the object’s motion and perpendicular to the tangential speed. c. in the plane of the object’s motion and in the same direction as the tangential speed. d. in the plane of the object’s motion and in the direction opposite the tangential speed. Please select the best answer from the choices provided A B C D

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