Aball of clay sinks when placed in water. the same piece of clay floats if it is made into the shape of a boat.
why does the clay float when made into the shape of a boat?
a. the clay is less dense when stretched into the shape of a boat.
b. the buoyant force is greater on the clay when it has a spherical shape.
c. the boat shape displaces a greater volume of water than the ball shape.
d. the weight of the clay boat is less than the weight of the clay ball.

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