AP EAMCET202021 Sep 2020Morning ShiftPhysicsWork, Power and EnergyActual
The minimum horizontal speed with which a body must be projected, so that it goes around a smooth vertical circular track of radius (4 ~m ) is ( (g=9.8 ~ms ⁻² ) )
Options
- A(7 ~ms ⁻¹ )
- B(14 ~ms ⁻¹ )
- C(0.7 ~ms ⁻¹ )
- D(1.4 ~ms ⁻¹ )
Correct answer
B. (14 ~ms ⁻¹ )
Step-by-step solution
Radius of circular vertical track, (r=4 ~m , g=9.8 ~ms ⁻² ) ( ) Minimum horizontal speed at lowest point to complete the revolution in vertical circle, (v= 5 g r = 5 9.8 4 = 196 =14 ~ms ⁻¹ )