Q16 of 124 Page 55

State whether force is a scalar or a vector quantity.

Force is defined as the product of mass and acceleration. We know, that mass is a scalar quantity while acceleration is a vector quantity whose direction and magnitude both can be specified. The product of a scalar and vector always yield a vector quantity. Hence, force is a vector quantity.


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The mass of object A is 6 kg whereas that of another object B is 34 kg. Which of the two objects, A or B, has more inertia?

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Name the scientist who gave the laws of motion.

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With which physical quantity should the speed of a running bull the multiplied so as to obtain its momentum?

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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 forever.