Question

If x = at + bt², where x is the distance travelled by the body in kilometers while t is the time in seconds, then the unit of b is ______.

Options

• km/s

• kms

• km/s²

• kms²

Answer 1

If x = at + bt², where x is the distance travelled by the body in kilometers while t is the time in seconds, then the unit of b is km/s².

Explanation:

[x] = [bt²]. Hence [b] = [x/t²] = km/s²