The chart below represents the change in velocity for four different trains. Change in Velocity for four different trains, Train, Initial Velocity, Final Velocity, W, 60, 91, X, 39, 68, Y, 42, 70, Z, 65, 94 If it took 5.38 s for each train to reach the final velocity, which train had the smallest acceleration?

Explanation:

Acceleration = (final velocity - initial velocity)  / time

Acceleration of W = ( 91 - 60 ) / 5.38 = 5.76 m /s²

Acceleration of X  = ( 68 - 39  ) / 5.38 = 5.39  m /s²

Acceleration of Y = ( 70 - 42 ) / 5.38 = 5.20 m /s²

Acceleration of W = ( 94 - 65 ) / 5.38 = 5.39  m /s²

So Train Y is the smallest acceleration.

he made 11 calls in one day

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.