What units are used to measure force

2 answers:

8 0

In the metric system, the most common unit used is a Newton, which is a (kg x m)/sec^2 and in the English system, the most common unit is a Pound, which is a (slug x ft)/sec^2.

But really, any unit that conforms to a the diagram of a mass times a length divided by a time squared can be used to measure force. A microgram x kilometer divided by decade^2 is also a unit to measure force, albeit a very ugly one. I hope this helps :)

Nastasia [14]4 years ago

5 0

N, or Neutons are a common way to measure force

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An Olympic track runner starts from rest and has an acceleration of 2.4 m/s2 for 3.6 s, then has zero acceleration for the remai

rjkz [21]

Answer:

The runner's speed at the following times would remain 8.64 m/s.

Explanation:

Acceleration definition: Acceleration is rate of change in velocity of an object with respect to time.

In this case, after 3.6 seconds the acceleration is zero, it means that the velocity of the runner after 3.6 seconds is not changing and it will remain constant for the remainder of the race. Now, we have to find the velocity of the runner that he had after 3.6 seconds and that would be the runner's speed for the remainder of the race. For this we use first equation of motion.

First equation of motion: Vf = Vi + a×t

Vf stands for final velocity

Vi stands for initial velocity

a stands for acceleration

t stands for time

In the question, it is mentioned that the runner starts from rest so its initial velocity (Vi) will be 0 m/s.

The acceleration (a) is given as 2.4 m/s²

The time (t) is given as 3.6 s

Now put the values of Vi, a and t in first equation of motion

Vf = Vi + a×t

Vf = 0 + 2.4×3.6

Vf = 2.4×3.6