PHYSICS MIDDLE SCHOOL

What kind of levers are your arms and legs

Answers

Answer 1
Answer:

Answer:

Legs are the 2nd class lever.

Arms are the 3rd class lever.

Explanation:

A lever is an inflexible body fit for turning on a point on itself. There are three types of lever

1) 1st class lever:  (pivot is in the center of load and effort)

In the human body are uncommon. One model is the joint between the head and the principal vertebra                    

2) 2nd class lever: (load is in the center of pivot and effort)

In the human body, the 2nd class lever is found in the lower leg when somebody remains on tiptoes.

3) 3rd class lever: (The load is far from the pivot than the effort.)

In the human body; one model can be delineated in the elbow joint

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The force of gravity down on the boy= 300NThe boy's weight down on the floor= 300N
The floor's reaction force back up on the boy= 300N

His WEIGHT IS EVENLY DISTRIBUTED OVER EACH FOOT
What is the net force on the boy?

Answers


The net force on the boy is zero.

Based on this analysis, I would expect the boy to not accelerate.
The net force of the boy is 300N=><=300N which equals a net force of 0N.

Which form of energy is observed when an athlete runs

Answers

The answer is kinetic energy because kinetics refers to the movement of the particular motion.
I am supporting the answer that Benny had just given you. 

How might wave energy impact theenvironment? Consider both intended and

unintended consequences.

Answers

Answer:

Refer below for the explanation.

Explanation:

Wave energy impacts the earth by utilizing proposed consequences to impact nature by rising normally on to things. The unintended consequences for instance it could vessels sinking.

5. Is it likely that light with frequencies higher than ultraviolet wasthe main cause of Tía Ana’s cataracts? Explain why or why not.

Answers

Answer: YES

Explanation:

If Tia Ana exposes her eyes to light ray in which it frequency is higher than ultraviolet ray, it may result to a gradual eyes issue such as cataracts as the radiation damages the cornea and the lens in front of the eyes.

One way that animals adapt to seasonal change

Answers

Different animals do different things in the seasons, In winter, some fly south for the winter and some hibernate, and some are still around. 
They migrate or hibernate

What is gravitational field intensity?​

Answers

Answers :

The gravitational field intensity (EG) or (g) is the force on a unit mass at a point in the field.  

Since the force (F) on a body of mass m in a gravitational field of a body of mass M = GMm/r2 .

you can see that the force per unit mass is given by F/m. So:

Gravitational Field Intensity (EG) = (g) = F/m = GM/r2

The units for EG are N kg -1 or since F = ma, F/m = a and so EG may be expressed in ms -2

Hope this will help you :))

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