The si unit that is used to measure time is the

The SI unit that is used to measure time is the 'second'.

Explanation:

The International System of Units has defined seven units of measure which are considered as a basic set from which all other SI units can be derived.

Hence, the base unit defined to measure the time is second. It is defined by the oscillations of the radiation which correspond to the transition between two levels of the caesium atom.

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i just did this and got a 100.

fgravity=10x10=100n case 1

fgravity=30x20=600n case 2

6 times more