kalakadu.com: Law of Motion

State Newton's second law, Law of Motion, 10th Science New Syllabus, 2019 - 2020 Tamil Nadu, TN,

Ans. According to Newton's second law, "The force acting on a body is directly proportional to the rate of change of linear momentum of the body and the change in momentum takes place in the direction of the force.

Classify the types of force based on their application, Law of Motion, 10th New Syllabus 2019-2020, Tamil Nadu, TN,

Ans. Based on the direction and application, forces can be classified into,

i. Like parallel forces

ii. Unlike parallel forces.

Define inertia. Give its classification, Law of Motion, 10th New Syllabus, TN, 2019 - 2020.

1. The inherent property of a body to resist any change in its state of rest or the state of uniform motion, unless it is influenced upon by an external unbalanced force, is known as inertia.

2. It is classified into three types,

i. inertia of rest

ii. inertia of motion

iii. inertia of direction.

Assertion and Reasoning. 10th New Syllabus, Law of Motion, TN, 2019 - 2020.

Assertion and Reasoning.

1. Assertion: The sum of the clockwise moments is equal to the sum of the anticlockwise moments.

Reason: The principle of conservation of momentum is valid if the external force on the system is zero.

a. If both the assertion and the reason are true and the reason is the correct explanation of the assertion.

b. If both the assertion and the reason are true, but the reason is not the correct explanation of the assertion.

c. Assertion is true, but the reason is false.

d. Assertion is false, but the reason is true.

Ans. b. If both the assertion and the reason are true, but the reason is not the correct explanation of the assertion.

2. Assertion: The value of 'g' decreases as height and depth increases from the surface of the Earth.

Reason: 'g' depends on the mass of the object and the Earth.