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’.Ĭlassify the types of force based on their application.īased on the direction in which the forces act, they can be classified into two types as: Reason: ‘g’ depends on the mass of the object and the Earth. Assertion: The value of ‘g’ decreases as height and depth increases from the surface of the Earth. Reason: The principle of conservation of momentum is valid if the external force on the system is zero.Ģ. Assertion: The sum of the clockwise moments is equal to the sum of the anticlockwise moments. (d) Assertion is false, but the reason is true.ġ. (c) Assertion is true, but the reason is false. (b) If both the assertion and the reason are true, but the reason is not the correct explanation of the assertion. (a) If both the assertion and the reason are true and the reason is the correct explanation of assertion. False – Astronauts are falling freely around the earth due to their huge orbital velocity.False – Turning a nut with a spanner having a longer handle is so easy than one with a short handle.False – Weight of a body is minimum at the equator.False – Apparent weight of a person is not always equal to his actual weight.There is no gravity in the orbiting space station around the Earth.Turning a nut with a spanner having a short handle is so easy than one with a long handle.Weight of a body is greater at the equator and less at the polar region.Apparent weight of a person is always equal to his actual weight.The linear momentum of a system of particles is always conserved.State whether the following statements are true or false. A man of mass 100 kg has a weight of …….By convention, the clockwise moments are taken as ……… and the anticlockwise moments are taken as ……….Passengers lean forward when the sudden brake is applied in a moving vehicle.(c) law of conservation of linear momentum To project the rockets which of the following principle(s) is / (are) required? If the Earth shrinks to 50% of its real radius its mass remaining the same, the weight of a body on the Earth will: When it is taken to a planet of radius half that of the Earth then its value will be …. The mass of a body is measured on planet Earth as M kg. In which of the following sport the turning effect of force is used? Plotting a graph for momentum on the X-axis and time on Y-axis.

Impulsive force model impulse