Fill in the following blanks with suitable words:
(a) To every action, there is an…..and….reaction
(b) Momentum is a…….quantity. Its unit is……
(c ) Newton's second law of motion can be written as Force=mass`xx`…….or Force=………….of change of..........
(d) Forces in a Newton's third law pair have equal......but act in opposite.....
(e) In collisions and explosions, the total.......remains constant, provided that no external........acts.

Fill in the following blanks with suitable words: b) If the two force applied to an object are equal and act in opposite directions, the net force acting on the object will be ……….

(A) : According to Newton's third law sum of action and reaction is not equal to zero (r) : The forces action and reaction acts on different bodies

(A) : According to Newton's third law sum of action and reaction is not equal to zero (r) : The forces action and reaction acts on different bodies

Fill in the following blanks with suitable words: (a) …... is a measure of the inertia of a body. (b) When a running car stops suddenly, the passengers are jerked ..... (c) When a stationary car starts suddenly, the passengers are jerked.... (d) Newton's first law of motion is also called Galileo's law of.... (e) If there were no unbalanced force of.... and no........ resistance, a moving bicycle would go on moving for ever.

Fill in the following blanks with suitable words : (a ) Force acting on a units area is called …….. (b) It is the …..force which makes objects appear lighter in water (c ) A heavy ship floats in water because its ………….density is less than that of water . (d ) In fluids (liquids and gases ), pressure acts in .........direction ,and pressure .....as the depth increases, (e ) In order to sink in fluid ,the density of an object must be .........than the ...... of the fluid . (f ) snow shoes work by spreding out a preson's ........over a much bigger ..........

Newton's.. . law of motion shows the relation between external force acting on the object and change in its momentum.

Fill in the following blanks with suitable words: (a) The acceleration due to gravity on the moon is about . (b) In order that the force of gravitation between two bodies may become noticeable and cause motion, one of the bodies must have an of that on the earth. extremely large ( c) The weight of an object on the earth is about ........of its weight on the moon. (d) The weight of an object on the moon is about (e) The value of g on the earth is about .... of that on the moon.