Newton First Law of Motion


 
 
Concept Explanation
 

Newton First Law of Motion

An object continues to be in motion with the same speed and in same direction unless acted upon by an unbalanced force. An object resists change in their state of rest or motion. it is also known as Law of Inertia.

Force is defined as the product of mass of the object and acceleration produced in the object. 

 F= m X  a

Where F is Force applied, ‘m is mass of object and a is acceleration produced’ in the object. The force is said to be 1N if it produces an acceleration of 1 m/s^2 in a body of mass 1 kg.

Illustration: What is the force applied by a  body of mass 4 kg producing an  acceleration of about 5m/s.

Solution :   Here, mass(m) = 4 Kg

                  Acceleration(a) = 5 m/s

                  Force  =  4  x  5  =  20 Kg m/s= 20 N

Sample Questions
(More Questions for each concept available in Login)
Question : 1

When a bus starts suddenly, the passengers standing in it leans backwards in the bus. This is an example of

Right Option : A
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Question : 2

If a body is at rest on the surface of the earth then which of the following statement is correct ?

Right Option : C
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Question : 3

______________ is defined as the product of mass of the object and acceleration produced in the object. 

Right Option : A
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Explanation
 
 
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