# Worksheet on Force and Laws of Motion class 9

Last updated on July 5th, 2023 at 02:07 pm

This post presents a **Force & Laws of Motion class 9 Worksheet** for high school students.

This worksheet with multiple choice questions is based on the chapters **(a) Laws of Motion & (b) Force** of different types. This is useful for **Class 9,10, and 11 **students of different boards like CBSE, ICSE, IGCSE, etc.

## Force & Laws of Motion Class 9 Worksheet

**1 ) First law of motion states that if an object experiences no net force, then its velocity is**

a) constant |

b) decreases |

c) increases |

d) equal to zero |

**2 ) According to the second law of motion, the acceleration of a body**

a) is inversely proportional to the mass of the body |

b) is proportional to the mass of the body |

c) does not depend on the mass of the body |

d) equal to zero |

3 ) According to three Newton’s laws of motion, massive objects

a) take more force to move |

b) take less force to move |

c) take more time to move |

d) can not be moved to large distances |

4 ) What is the significance of mass in determining force?

a) Determines magnitude |

b) Determines direction |

c) Determines distance |

d) Determines velocity |

5 ) Which of the following are examples of dynamics?

a) All of these answers |

b) A pulley system demonstrating push and pull |

c) Two magnets being attracted to one another |

d) An object resting on a surface |

6 ) What major topic in physics does mass play a central role in determining the behavior of bodies, such as force?

a) Newton’s Second law |

b) Kinetic Energy |

c) Momentum |

d) Thermodynamics |

7 ) If an object experiences no net force, its velocity will

a) remain constant |

b) decrease |

c) increase |

d) become zero |

8 ) The First Law of Motion explains the relationship between

a) velocity and motion |

b) force and motion |

c) time and space |

d) speed and acceleration |

9) The Second Law of Motion explains the relationship between

a) force and motion |

b) velocity and motion |

c) time and space |

d) speed and acceleration |

10 ) The net force on an object is equal to the

a) derivative of its linear momentum |

b) derivative of its speed |

c) derivative of its mass |

d) derivative of its internal energy |

11 ) The third law of motion states that

a) for every action, there is an equal and opposite reaction |

b) the net force on an object is equal to the rate of change, or derivative, of its linear momentum |

c) a body at rest stays at rest unless acted on by an external force |

d) a body in motion stays in motion unless acted on by an external force |

12 ) If something weighs 10N on Earth, what is the mass of the object?

a) 1 kg |

b) 1 N |

c) 10 kg |

d) 10 N |

13) How does the apparent weight of an object underwater differ from the same exact object in the air?

a) The buoyancy affects the apparent weight underwater |

b) The difference in gravity affects the apparent weight underwater |

c) The difference in mass affects the apparent weight underwater |

d) The apparent weight of the object is exactly the same both underwater and in the air |

14) What is the normal force of an object on Earth with a mass of 1 kg and on an incline of 60 degrees?

a) 5 N |

b) 20 N |

c) 200 N |

d) None of these |

15) If a person has a weight of 500 N, what is the normal force on that person riding an elevator moving up at a constant speed of 2 m/s?

a) 500 N |

b) 1000 N |

c) 4000 N |

d) 250 N |