**491. The angular speed for daily rotation of the earth in rad S-1 is______________?**

A. 7.3 x 10 radians/second

B. 7.3 x 5 radians/second

C. 3.7 x 10 7.3 x 5 radians/second

**D. 7.3 x 10-5 radians/second**

**492. When a wheel 1 m in diameter makes 30 rev min the linear speed of the point on its rim in ms-1 is_______________?**

A. 2π

**B. π/2**

C. π

D. 20π

**493. A cyclist cycling around a circular racing track skids because_____________?**

A. the centripetal force upon him is less than limiting friction

**B. the centripetal force upon him is greater than limiting friction**

C. the centripetal force upon him is equal to the limiting friction

D. the friction between the tyres of the cycle and road vanishes

**494. If a wheel of radius r turns through an angle of 30° then the distance through which any point on its rim moves is______________?**

A. π /3 x r

**B. π/6 x r**

C. V/30 x r

D. π / 180 x r

**495. In an angular motion, Newton’s second law of motion is_____________?**

A. F=ma

B. F=τp/It

**C. Στ = I α**

D. All above

**496. The angular speed of seconds hand of a watch in rads-1 is______________?**

A. π

B. π/2

**C. π/30**

D. π/180

**497. The shaft of a motor rotates at a constant angular speed of 360rev/min. Angle turned through in 1 sec in radian is________________?**

A. π

B. 3π

C. 6π

**D. 12π**

**498. What is the outward force acting on a mass of 10 kg when rotating at one end an inelastic string 10m long at speed of 1m/s ?**

**A. 1N**

B. 10N

C. 2N

D. 100N

**499. If we whirl a stone at the end of a string in the vertical circle, it is likely to break when the stone is________________?**

A. At the highest point

**B. At the lowest point**

C. At any point during motion

D. At the point where gravity is not acting

**500. Moving along the circumference of a circle completes two revolutions. If the radius of the circular path is R, the ratio of displacement to the covered path will be_______________?**

A. πR

B. 2πR

**C. 0**

D. 4πR