Question

If the unit of mass is doubled and the unit of length and time is halved , how much is
20N of force in new units .( 1N = 1 kg m sec
h 5 nenunits of force​

Answer 1

Answer:

Explanation:

mega (M) = one million or 106 times the basic unit

kilo (k) = one thousand or 103 times the basic unit

milli (m) = one thousandth or 10-3 times the basic unit.

By definition, force = mass x acceleration or F = ma

The unit of acceleration is metres per second per second (m/s/s) or metre per second squared (m/s2). If the acceleration is gravity, the acceleration is 9.8 metres per second squared (9.8 m/s2). This figure is sometimes rounded off to 10 m/s2 which builds in a conservative factor of 2% on all load calculations.

So the units of force (in F = ma) are:

F = kg x m/s2 or kg.m/s2

This unit of force has been given the name newton (N).

A force of 1 N is the force when an acceleration of 1 m/s2 acts on a mass of 1 kg.

1 N = 1 kg x 1 m/s2

The force produced by 1 kg when acted on by gravity is: 1 kg x 10 m/s2 = 10 N

From this it follows thatwill produce a force of 1 N.

This is a very small unit compared to the weight of a structure. Therefore a larger more useable unit is required. In structures the unit used is the kilonewton (kN) where:

1 kN = 1,000 N

Therefore to convert mass to force units (kN) suitable for structural calculations: