Question

2. Answer the followiny Yuju
a. What is the difference between mass and
weight of an object. Will the mass and
weight of an object on the earth be same
as their values on Mars? Why?
* What are (i) free fall, (ii) acceleration
due to gravity (iii) escape velocity (iv)
centripetal force ?




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Answer 1

mass=

1. the amount of matter present in the object is called mass of that object.
2. mass is a scalar quantity.
3. mass is a inertial of the object.

weight=

1. the gravitational force acting on the object is called weight of that object.
2. weight is a vector quantity.
3. weight is the product of mass ana acceleration due to gravity

what are.

1. when the object moves only due to the action of force of gravity,is called free fall.
2. the acceleration produced in a body due to earth's gravitational force is called acceleration due to gravity.
3. the minium velocity with which the object should be projected from the earth's surface so that it can escape from earth's gravitational pull is called escape velocity.
4. the force that acts towards the centre of a circle is called centripetal force.