For ordinary terrestrial experimants, the observer is an inertial frame in the following cases is

Options

A. a child revolving in a giant wheel
B. a driver in a sports car moving with a constant high speed of 200 `kmh^(-1)` on a straight rod
C. the pilot of an aeroplane which is taking off
D. a cyclist negotiating a sharp curve

Answer

B

Explanation

An inertial frame is a non-accelerated frame. (a), (c ), (d) have all circular motion or motion along a curved path. They have all acceleration, although in curvilinear motion, centripetal acceleration is made ineffective by the centrifugal force.