Rocket engines lift a rocket from the earth surface because of hot gases with high velocity ___________.

React against the rocket and push it up

Heat up the air which lifts the rocket

Which of the following is most likely not a case of uniform circular motion?

Motion of a racing car on a circular track

Motion of a toy train on a circular track

Motion of the earth around the sun

Motion of hours’ hand on the dial of a clock

First increases and then decreases

The dimensional formula of acceleration is given by,

M⁰L¹T^-2

Where,

Acceleration (a) = Velocity × Time^-1 . . . . . (1)

Since, Velocity (V) = Displacement × Time^-1

∴ The dimensional formula of velocity is [M⁰ L¹ T^-1] . . . . (2)

On substituting equation (2) in equation (1) we get,

Acceleration = Velocity × Time^-1

Or, a = [M⁰ L¹ T^-1] × [T]^-1 = [M⁰ L¹ T^-2]

Therefore, acceleration is dimensionally represented as [M⁰ L¹ T^-2].