# Mechanics One Liner Questions & Answers

Questions | Answers | |

1 | A simple machine helps a person in doing – | The same amount of work with lesser force |

2 | A man is standing on a sensitive balance. If he inhales deeply, the reading of the balance – | Increases |

3 | Which physical quantity is represented by the ratio of momentum and velocity of the body? | Mass |

4 | Force is the product of – | Mass and acceleration |

5 | If the number represents volume and surface area of a cube are equal, then the length of the edge of the cube in terms of the unit of measurement will be – | 6 |

6 | Energy conservation means – | Energy can neither be created nor destroyed |

7 | The energy of wind is – | Only kinetic |

8 | In wind power, which form of energy is converted into electrical energy? | Kinetic energy |

9 | Newton’s first law of motion is known as – | Law of Inertia |

10 | As the train starts moving, the head of the passenger sitting inside leans backward because of – | Inertia of Rest |

11 | Static science is associated with – | Situation of rest |

12 | It is more difficult to walk on the ice than on the road because – | Ice has a lesser friction than the road. |

13 | For every action there is an equal and opposite reaction. The law was given by – | Newton |

14 | A man jumped at a speed of 5 meters per second from a stationary boat and the boat moved off at the speed of 0.5 meters per second. How many times is the mass of the boat greater than that of the man? | 10 times |

15 | A truck, a car, and a motorcycle have equal kinetic energies. If equal stopping forces are applied and they stop after traveling a distance of X, Y, and Z respectively, then – | X = Y = Z |

16 | The ratio of kinetic energies of two bodies of the same mass is 4: 9, the ratio of their velocities will be – | 2 – 3 |

17 | Cycles and cars use ball bearings, because – | The effective area of contact between the wheel and axle is reduced. |

18 | An oil tanker is partially filled with oil and moves forward on a level road with uniform acceleration. The free surface of oil then – | Is inclined to the horizontal with a larger depth at the rear end |

19 | A batsman hits a cricket ball which then rolls on a level ground. After covering a short distance, the ball comes to rest. The ball slows to a stop because – | There is a force on the ball opposing the motion |

20 | What is the correct equation for finding the acceleration? | A = v-u/t |

21 | The working principle of a washing machine is – | Centrifugation |

22 | The separation of cream from milk by churning is due to – | Centrifugal force |