Which statement is true about additional force being applied to an object in motion?

a. if an object is in motion and more force is applied in the direction of its motion, the object will remain at a constant speed.

b. if an object is in motion and more force is applied in the direction of its motion, the object will begin moving faster.

c. if an object is in motion and more force is applied in the direction of its motion, the object will begin to slow down.

d. if an object is in motion and more force is applied in the direction of its motion, the object will come to a complete stop.

The correct answer is b. A good way to think about this is if a car is already moving and you hit the gas pedal, it will move faster.

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