KCET2017PhysicsNuclear Physics
The angle between velocity and acceleration of a particle describing uniform circular motion is
Options
- A( 45^ )
- B( 60^ )
- C( 90^ )
- D( 180^ )
Correct answer
C. ( 90^ )
Step-by-step solution
As the lift is freely falling, thus its acceleration in down ward direction ( a = g ) Let the mass of the body be (m ) and force acting on it due to spring be (F ). Writing equation of motion for the body: (m a=m g-F ) Or ( mg = mg - F ) ( F =0 ) Thus no force is acting on the body due to spring, so the reading of the spring balance is zero.