## Multiple Choice Questions on Turning Effect of Forces

Select the best possible answer.

- Conventionally anticlockwise torque is taken as ………

A. Negative | B. | C. Parallel | D. zero |

- A door requires a minimum torque of 80 N m in order to open it. What is the minimum distance of the handle from the hinges, if the door is to be pulled with a force at the handle not greater than 100 N?

A. 0.6 m | B. 1 m | C. 0.4 m | D. |

- Two children are balanced on opposite sides of a seesaw. If one child leans inward toward the pivot point, her side will

A. | B. fall | C. insufficient data | D. neither rise nor fall |

- A body in equilibrium must not be

A. at rest | B. moving | C. rotating | D. |

- The torque in uniformly rotating fan having blade of length 0.5 m is

A. 0.5 N m | B. 2 N m | C. -0.5 N m | D. |

- A force of 100 N is applied perpendicularly at 0.5 m to turn nut of wheel of a bus. The torque acting on nut is

A. 500 N m | B. | C. 5 N m | D. 0.005 N m |

- The shortest distance between two couple forces is

A. moment arm | B. | C. radius | D. double moment |

- A girl pushes to open a door perpendicularly with a force of 25 N at 0.6 m from the hinge, the torque is

A. 41.6 N m | B. 25.6 N m | C. | D. 0 N m |

- The angle at which x and y components of force are equal is

A. 0° | B. 30° | C. | D. 60° |

- CM is different from CG when we have non uniform

A. | B. mass of object | C. gravitational force | D. none of these |