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3 years ago

What is the purpose of the background research step of the scientific method?

1 answer:

3 0

Background research is used to familiarize yourself with the topic or problem you're conducting your experiment on and help you form an educated guess explaining or solving it that will become your hypothesis.

You might be interested in

Why do you think that some asteroids tumble end over end through space while other asteroids rotate around their axis?

Scilla [17]

Asteroids do this because of Newton's Third Law. When a asteroid hits something, it will keep on moving (spinning) until it hits something else.

6 0

3 years ago

Na figura, um bloco de massa igual a 5Kg é abandonado em repouso em um plano inclinado. Supondo que os coeficientes de atrito es

Law Incorporation [45]

The figure mentioned on the question is in the attachment.

Answer: a) $P_{x}$ = - 38.35N

b) $F_{N}$ = 30.5 N

c) $F_{f}$ = 27.45 N

d) a = - 13.16 m/s²

Explanation: A block on an inclined plane has 3 forces acting on it:

Force due to gravity $F_{g}$ = m.g;
Normal Force due to the plane;
Force of Friction $F_{f}$ = µ.N;

Since the plane is inclined, Normal Force is equal the y-component of the force due to gravity and Force of friction and the x-component of the force due to gravity are opposite forces.

The second attachment ilustrate the forces acting on the block.

Calculating:

A) The magnitude of the x-component of Force due to gravity:

According to the second image:

$P_{x}$ = P.sinθ

$P_{x}$ = 5.9.8.sin(36.8)

$P_{x}$ = - 38.35 N

B) $F_{N}$ = $P_{y}$ = m.g.cosθ

$F_{N}$ = 5.9.8.cos(36.8)

$F_{N}$ = 30.5 N

C) $F_{f}$ = 0.9.30.5

$F_{f}$ = 27.45 N

D) For the acceleration, use Newton's Law: $F_{R}$ = m . a

If there is movement, it is only on x-axis, so the net force is:

$P_{x}$ - $F_{f}$ = m.a

- 38.35 - 27.45 = 5a

a = - 13.16 m/s²

The value of acceleration shows there is <u>no</u> <u>movement</u> on the x-axis due to the friction.

7 0

3 years ago

If two bodies weighing 10 kg and 20 kg respectively are standing at the

kvv77 [185]

Answer:

potential energy = mgh , where m is mass of body , g is acceleration due to gravity and h is given height

since both of the body are at same height above the ground , so the body having greater mass will have more potential energy

that is 20 kg body will have higher P.E

Explanation:

7 0

3 years ago

A person is standing on a level floor. His head, upper torso, arms, and hands together weigh 458 N and have a center of gravity

Step2247 [10]

Answer:

the location of the center of gravity for the entire body is 1.08 m

Explanation:

Given the data in the question;

w1 = 458 N, y1 = 1.34 m

w2 = 120 N, y2 = 0.766 m

w3 = 89.8 N, y2 = 0.204 m

The location arrangement of the body part is vertical, locate the overall centre of gravity by simply replacing the horizontal position x by the vertical position y as measured relative to the floor.

so,

$Y_{centre of gravity}$ = (w1y1 + w2y2 + w3y3 ) / ( w1 + w2 + w3 )

so we substitute in our values

$Y_{centre of gravity}$ = (458×1.34 + 120×0.766 + 89.8×0.204 ) / ( 458 + 120 + 89.8 )

$Y_{centre of gravity}$ = 723.9592 / 667.8

$Y_{centre of gravity}$ = 1.08 m

Therefore, the location of the center of gravity for the entire body is 1.08 m

5 0

3 years ago

Two objects exert a gravitational force on 8N on one another what would that force be if the mass of both objects were doubled?

jolli1 [7]

Gravitational force of attraction between two objects can be calculated from the following formula:
$F = \frac{m_1 \cdot m_2}{r^{2}}$
Where m with subscript stands for mass of the object and r is the distance between them.
When we double the mass of those two objects, distance between them stays the same, while in the numerator we have:
$2\cdot m_1 \cdot 2 \cdot m_2 = 4\cdot m_1 \cdot m_2$
When numerator in the second case 4 times greater than the 'original' numerator and denominator stays the same, force becomes 4 times greater.

3 0

3 years ago