PHYSICS AND HEALTHY REASON # 2

Do you have difficulty learning Physics?

Well that is because the younger siblings have the wrong way of learning,

The younger siblings always ship the complicated physics formula.

Indeed the physics formula is difficult to memorize and more. Although you all memorize all the physics formulas, it is not certain that you can do physics problems, now that makes it difficult for you to learn physics.

Now let me tell you an easy way to learn physics with common sense (logic).

Well, how do you do: remind the Pitagorean numbers:

3     4     5

Pitagorean triangle:

Figure 1

Example questions taken from SMPTN questions:

Figure 2

Determine the ratio of Ma: Mb

Common sense or logic:

Remember in front of corner 37 is 3. means ΣFx = 0, Mb = 3.

Remember next to angle 37 is 4, meaning ΣFy = 0, Ma = 4

So  Ma: Mb = 4: 3.

The real way:

ΣFx = 0

Sin 37 = Mb ………………………. (1)

ΣFy = 0

T Cos 37 = Ma …………………… .. (2)

Compare equation (1) with equation (2) obtained:

T Sin 37 / T Cos 37 = Mb: Ma

Tan 37 = Mb: Ma

3: 4 = Mb: Ma

So Ma: Mb = 4: 3

The results are the same.

Apparently easy.