Question

which is the greatest acceleration​

Answer 1

Answer:

Correct option is

A

2

a

S

There is no limit on the speed of the train, so minimum time will be when the train will accelerate for

2

T

and deaccelerate for

2

T

.

So time taken will calculated by S=ut+

2

1

at

2

, where u=0, displacement=

2

S

,time=

2

T

, same distance will be covered while acceleration as well as deacceleration.

So T=2

a

S

Answer 2

A=F/M (Acceleration = Force/Mass) is a good calculation for acceleration, and is typically the one you'd use for maximum acceleration.

For example, if a car turns a corner at constant speed, it is accelerating because its direction is changing. The quicker you turn, the greater the acceleration. So there is an acceleration when velocity changes either in magnitude (an increase or decrease in speed) or in direction, or both.