Class 11 | Circular motion | A man run along a straight path at the speed of 4m/s. A searchlight is located on the ground 20m from the path and is kept focused on the man. At what rate is the search light rotating when the man is 15m from the point on the path closest to the searchlight.

 

Class 11 | Circular Motion | A body of mass 4kg is moved in a vertical circle with sufficient speed. Its tangetntial acceleration, when the string makes an angle of 30 degree with the vertical downward is (g= 10m/s2)

 

ANS: 5 m/s^2

Class 11 | Circular Motion | The angular speed of a particle, moving in a circle of radius 20 cm, increases from 2 rad/s to 40 rad/s in 19 s the ratio of its centripetal acceleration to tangential acceleration at the end of 19 s is,

 

Class 11 | Circular motion | A mass of 5 kg is tied to a string of length1.0m and is rotate in vertical circle with a uniformspeed of 4m/s The tension in the string will be 130N when the mass is at ( g = 10m/s2)