NTA Abhyas JEE Main2020PhysicsLaws of MotionPractice
In a circular motion of a particle, the tangential acceleration of the particle is given by a t = 9 m s - 2 . The radius of the circle is 4 m . The particle was initially at rest. Time after which total acceleration of the particle makes an angle of 45 ° with the radial acceleration is
Options
- A1 3   s
- B2 3   s
- C5 3   s
- D4 3   s
Correct answer
B. 2 3   s
Step-by-step solution
At 45 ° , a t = a r = 9 v 2 r = v 2 4 = 9 v = 6   m   s - 1 6 = 0 + 9 t t = 2 3   s .