Question

An object moving with initial velocity (u) under constant accleration a. Find the displacement of the objed in hth Secsund.​

Answer 1

Explanation:

Correct option is

A

2

9

×acceleration

From second equation of motion, s=ut+

2

1

at

2

The displacement after t = 5 seconds will be s

5

=5u+

2

1

a5

2

The displacement after t = 4 seconds will be s

4

=4u+

2

1

a4

2

Displacement between 4th and 5th second will be s

5

−s

4

=(5u+

2

1

a5

2

)−(4u+

2

1

a4

2

).

=u+

2

1

a(25−16)=u+

2

9

a

=

2

9

a