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Laws of Motion
Question
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Universal time is based on

  • rotational effect of the earth about its axis

  • vibrations of cesium atom

  • orbital motion of the earth around the sun

  • oscillation of quartz crystal

Answer

A.

rotational effect of the earth about its axis

Time defined in terms of the rotation of the earth is called Universal Time (UT).

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Some More Questions From Laws of Motion Chapter

State Galileo’s law of motion.

Define inertia.

When the branches of an apple tree are shaken, the apples fall down. Why?

A person jumping out from a moving car or bus falls forward. Why?

Due to what type of inertia, the spark leaves the grind stone tangentially while sharpening the knife?

Which law of motion is also called law of inertia?

What is measure of inertia of body?

Which law of motion defines the force?

What happens to a stone tied to the end of string and whirled in a circle if the string suddenly breaks?

Which law of motion gives the quantitative knowledge of force?